diff --git a/examples/BQ25896_Example/BQ25896_Example.ino b/examples/BQ25896_Example/BQ25896_Example.ino
index 886293c..864d6b9 100644
--- a/examples/BQ25896_Example/BQ25896_Example.ino
+++ b/examples/BQ25896_Example/BQ25896_Example.ino
@@ -8,7 +8,7 @@
  */
 #include <XPowersLib.h>
 
-PowersSY6970 PMU;
+XPowersPPM PPM;
 
 
 #ifndef CONFIG_PMU_SDA
@@ -35,59 +35,59 @@ void setup()
     while (!Serial);
 
 
-    bool result =  PMU.init(Wire, i2c_sda, i2c_scl, BQ25896_SLAVE_ADDRESS);
+    bool result =  PPM.init(Wire, i2c_sda, i2c_scl, BQ25896_SLAVE_ADDRESS);
 
     if (result == false) {
         while (1) {
-            Serial.println("PMU is not online...");
+            Serial.println("PPM is not online...");
             delay(50);
         }
     }
 
-    // Set the minimum operating voltage. Below this voltage, the PMU will protect
-    PMU.setSysPowerDownVoltage(3300);
+    // Set the minimum operating voltage. Below this voltage, the PPM will protect
+    PPM.setSysPowerDownVoltage(3300);
 
     // Set input current limit, default is 500mA
-    PMU.setInputCurrentLimit(3250);
+    PPM.setInputCurrentLimit(3250);
 
-    Serial.printf("getInputCurrentLimit: %d mA\n", PMU.getInputCurrentLimit());
+    Serial.printf("getInputCurrentLimit: %d mA\n", PPM.getInputCurrentLimit());
 
     // Disable current limit pin
-    PMU.disableCurrentLimitPin();
+    PPM.disableCurrentLimitPin();
 
     // Set the charging target voltage, Range:3840 ~ 4608mV ,step:16 mV
-    PMU.setChargeTargetVoltage(4208);
+    PPM.setChargeTargetVoltage(4208);
 
     // Set the precharge current , Range: 64mA ~ 1024mA ,step:64mA
-    PMU.setPrechargeCurr(64);
+    PPM.setPrechargeCurr(64);
 
     // The premise is that Limit Pin is disabled, or it will only follow the maximum charging current set by Limi tPin.
     // Set the charging current , Range:0~5056mA ,step:64mA
-    PMU.setChargerConstantCurr(1024);
+    PPM.setChargerConstantCurr(1024);
 
     // Get the set charging current
-    PMU.getChargerConstantCurr();
-    Serial.printf("getChargerConstantCurr: %d mA\n", PMU.getChargerConstantCurr());
+    PPM.getChargerConstantCurr();
+    Serial.printf("getChargerConstantCurr: %d mA\n", PPM.getChargerConstantCurr());
 
 
     // To obtain voltage data, the ADC must be enabled first
-    PMU.enableADCMeasure();
+    PPM.enableADCMeasure();
 
     // Turn on charging function
     // If there is no battery connected, do not turn on the charging function
-    PMU.enableCharge();
+    PPM.enableCharge();
 
     // Turn off charging function
     // If USB is used as the only power input, it is best to turn off the charging function,
     // otherwise the VSYS power supply will have a sawtooth wave, affecting the discharge output capability.
-    // PMU.disableCharge();
+    // PPM.disableCharge();
 
 
     // The OTG function needs to enable OTG, and set the OTG control pin to HIGH
     // After OTG is enabled, if an external power supply is plugged in, OTG will be turned off
 
-    // PMU.enableOTG();
-    // PMU.disableOTG();
+    // PPM.enableOTG();
+    // PPM.disableOTG();
     // pinMode(OTG_ENABLE_PIN, OUTPUT);
     // digitalWrite(OTG_ENABLE_PIN, HIGH);
 
@@ -104,47 +104,47 @@ void loop()
     if (pmu_irq) {
         pmu_irq = false;
 
-        // Get PMU interrupt status
-        PMU.getIrqStatus();
+        // Get PPM interrupt status
+        PPM.getIrqStatus();
 
         Serial.print("-> [");
         Serial.print(millis() / 1000);
         Serial.print("] ");
 
-        if (PMU.isWatchdogFault()) {
+        if (PPM.isWatchdogFault()) {
 
             Serial.println("Watchdog Fault");
 
-        } else if (PMU.isBoostFault()) {
+        } else if (PPM.isBoostFault()) {
 
             Serial.println("Boost Fault");
 
-        } else if (PMU.isChargeFault()) {
+        } else if (PPM.isChargeFault()) {
 
             Serial.println("Charge Fault");
 
-        } else if (PMU.isBatteryFault()) {
+        } else if (PPM.isBatteryFault()) {
 
             Serial.println("Batter Fault");
 
-        } else if (PMU.isNTCFault()) {
+        } else if (PPM.isNTCFault()) {
 
             Serial.print("NTC Fault:");
-            Serial.print(PMU.getNTCStatusString());
+            Serial.print(PPM.getNTCStatusString());
             Serial.print(" Percentage:");
-            Serial.print(PMU.getNTCPercentage()); Serial.println("%");
+            Serial.print(PPM.getNTCPercentage()); Serial.println("%");
         }
         // The battery may be disconnected or damaged.
-        else if (PMU.isVsysLowVoltageWarning()) {
+        else if (PPM.isVsysLowVoltageWarning()) {
 
             Serial.println("In VSYSMIN regulation (BAT<VSYSMIN)");
 
         } else {
             /*
             * When the battery is removed, INT will send an interrupt every 100ms. If the battery is not connected,
-            * you can use PMU.disableCharge() to turn off the charging function.
+            * you can use PPM.disableCharge() to turn off the charging function.
             * */
-            // PMU.disableCharge();
+            // PPM.disableCharge();
 
             Serial.println("Battery remove");
         }
@@ -159,13 +159,13 @@ void loop()
     * * */
     if (millis() > cycleInterval) {
         Serial.printf("CHG TARGET VOLTAGE :%04dmV CURRENT:%04dmA PER_CHARGE_CUR %04dmA\n",
-                      PMU.getChargeTargetVoltage(), PMU.getChargerConstantCurr(), PMU.getPrechargeCurr());
-        Serial.printf("VBUS:%s %04dmV VBAT:%04dmV VSYS:%04dmV\n", PMU.isVbusIn() ? "Connected" : "Disconnect",
-                      PMU.getVbusVoltage(),
-                      PMU.getBattVoltage(),
-                      PMU.getSystemVoltage());
-        Serial.printf("BUS STATE:%d STR:%s\n", PMU.getBusStatus(), PMU.getBusStatusString());
-        Serial.printf("CHG STATE:%d STR:%s CURRENT:%04dmA\n", PMU.chargeStatus(), PMU.getChargeStatusString(), PMU.getChargeCurrent());
+                      PPM.getChargeTargetVoltage(), PPM.getChargerConstantCurr(), PPM.getPrechargeCurr());
+        Serial.printf("VBUS:%s %04dmV VBAT:%04dmV VSYS:%04dmV\n", PPM.isVbusIn() ? "Connected" : "Disconnect",
+                      PPM.getVbusVoltage(),
+                      PPM.getBattVoltage(),
+                      PPM.getSystemVoltage());
+        Serial.printf("BUS STATE:%d STR:%s\n", PPM.getBusStatus(), PPM.getBusStatusString());
+        Serial.printf("CHG STATE:%d STR:%s CURRENT:%04dmA\n", PPM.chargeStatus(), PPM.getChargeStatusString(), PPM.getChargeCurrent());
         Serial.printf("[%lu]", millis() / 1000);
         Serial.println("----------------------------------------------------------------------------------");
         cycleInterval = millis() + 1000;
diff --git a/examples/SY6970_Example/SY6970_Example.ino b/examples/SY6970_Example/SY6970_Example.ino
index c371868..9df4bfd 100644
--- a/examples/SY6970_Example/SY6970_Example.ino
+++ b/examples/SY6970_Example/SY6970_Example.ino
@@ -10,7 +10,7 @@
  */
 #include <XPowersLib.h>
 
-PowersSY6970 PMU;
+XPowersPPM PPM;
 
 
 #ifndef CONFIG_PMU_SDA
@@ -37,59 +37,59 @@ void setup()
     while (!Serial);
 
 
-    bool result =  PMU.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
+    bool result =  PPM.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
 
     if (result == false) {
         while (1) {
-            Serial.println("PMU is not online...");
+            Serial.println("PPM is not online...");
             delay(50);
         }
     }
 
-    // Set the minimum operating voltage. Below this voltage, the PMU will protect
-    PMU.setSysPowerDownVoltage(3300);
+    // Set the minimum operating voltage. Below this voltage, the PPM will protect
+    PPM.setSysPowerDownVoltage(3300);
 
     // Set input current limit, default is 500mA
-    PMU.setInputCurrentLimit(3250);
+    PPM.setInputCurrentLimit(3250);
 
-    Serial.printf("getInputCurrentLimit: %d mA\n", PMU.getInputCurrentLimit());
+    Serial.printf("getInputCurrentLimit: %d mA\n", PPM.getInputCurrentLimit());
 
     // Disable current limit pin
-    PMU.disableCurrentLimitPin();
+    PPM.disableCurrentLimitPin();
 
     // Set the charging target voltage, Range:3840 ~ 4608mV ,step:16 mV
-    PMU.setChargeTargetVoltage(4208);
+    PPM.setChargeTargetVoltage(4208);
 
     // Set the precharge current , Range: 64mA ~ 1024mA ,step:64mA
-    PMU.setPrechargeCurr(64);
+    PPM.setPrechargeCurr(64);
 
     // The premise is that Limit Pin is disabled, or it will only follow the maximum charging current set by Limi tPin.
     // Set the charging current , Range:0~5056mA ,step:64mA
-    PMU.setChargerConstantCurr(1024);
+    PPM.setChargerConstantCurr(1024);
 
     // Get the set charging current
-    PMU.getChargerConstantCurr();
-    Serial.printf("getChargerConstantCurr: %d mA\n", PMU.getChargerConstantCurr());
+    PPM.getChargerConstantCurr();
+    Serial.printf("getChargerConstantCurr: %d mA\n", PPM.getChargerConstantCurr());
 
 
     // To obtain voltage data, the ADC must be enabled first
-    PMU.enableADCMeasure();
+    PPM.enableADCMeasure();
 
     // Turn on charging function
     // If there is no battery connected, do not turn on the charging function
-    PMU.enableCharge();
+    PPM.enableCharge();
 
     // Turn off charging function
     // If USB is used as the only power input, it is best to turn off the charging function,
     // otherwise the VSYS power supply will have a sawtooth wave, affecting the discharge output capability.
-    // PMU.disableCharge();
+    // PPM.disableCharge();
 
 
     // The OTG function needs to enable OTG, and set the OTG control pin to HIGH
     // After OTG is enabled, if an external power supply is plugged in, OTG will be turned off
 
-    // PMU.enableOTG();
-    // PMU.disableOTG();
+    // PPM.enableOTG();
+    // PPM.disableOTG();
     // pinMode(OTG_ENABLE_PIN, OUTPUT);
     // digitalWrite(OTG_ENABLE_PIN, HIGH);
 
@@ -105,47 +105,47 @@ void loop()
 {
     if (pmu_irq) {
         pmu_irq = false;
-        // Get PMU interrupt status
-        PMU.getIrqStatus();
+        // Get PPM interrupt status
+        PPM.getIrqStatus();
 
         Serial.print("-> [");
         Serial.print(millis() / 1000);
         Serial.print("] ");
 
-        if (PMU.isWatchdogFault()) {
+        if (PPM.isWatchdogFault()) {
 
             Serial.println("Watchdog Fault");
 
-        } else if (PMU.isBoostFault()) {
+        } else if (PPM.isBoostFault()) {
 
             Serial.println("Boost Fault");
 
-        } else if (PMU.isChargeFault()) {
+        } else if (PPM.isChargeFault()) {
 
             Serial.println("Charge Fault");
 
-        } else if (PMU.isBatteryFault()) {
+        } else if (PPM.isBatteryFault()) {
 
             Serial.println("Batter Fault");
 
-        } else if (PMU.isNTCFault()) {
+        } else if (PPM.isNTCFault()) {
 
             Serial.print("NTC Fault:");
-            Serial.print(PMU.getNTCStatusString());
+            Serial.print(PPM.getNTCStatusString());
             Serial.print(" Percentage:");
-            Serial.print(PMU.getNTCPercentage()); Serial.println("%");
+            Serial.print(PPM.getNTCPercentage()); Serial.println("%");
         }
         // The battery may be disconnected or damaged.
-        else if (PMU.isVsysLowVoltageWarning()) {
+        else if (PPM.isVsysLowVoltageWarning()) {
 
             Serial.println("In VSYSMIN regulation (BAT<VSYSMIN)");
 
         } else {
             /*
             * When the battery is removed, INT will send an interrupt every 100ms. If the battery is not connected,
-            * you can use PMU.disableCharge() to turn off the charging function.
+            * you can use PPM.disableCharge() to turn off the charging function.
             * */
-            // PMU.disableCharge();
+            // PPM.disableCharge();
 
             Serial.println("Battery remove");
         }
@@ -160,13 +160,13 @@ void loop()
     * * */
     if (millis() > cycleInterval) {
         Serial.printf("CHG TARGET VOLTAGE :%04dmV CURRENT:%04dmA PER_CHARGE_CUR %04dmA\n",
-                      PMU.getChargeTargetVoltage(), PMU.getChargerConstantCurr(), PMU.getPrechargeCurr());
-        Serial.printf("VBUS:%s %04dmV VBAT:%04dmV VSYS:%04dmV\n", PMU.isVbusIn() ? "Connected" : "Disconnect",
-                      PMU.getVbusVoltage(),
-                      PMU.getBattVoltage(),
-                      PMU.getSystemVoltage());
-        Serial.printf("BUS STATE:%d STR:%s\n", PMU.getBusStatus(), PMU.getBusStatusString());
-        Serial.printf("CHG STATE:%d STR:%s CURRENT:%04dmA\n", PMU.chargeStatus(), PMU.getChargeStatusString(), PMU.getChargeCurrent());
+                      PPM.getChargeTargetVoltage(), PPM.getChargerConstantCurr(), PPM.getPrechargeCurr());
+        Serial.printf("VBUS:%s %04dmV VBAT:%04dmV VSYS:%04dmV\n", PPM.isVbusIn() ? "Connected" : "Disconnect",
+                      PPM.getVbusVoltage(),
+                      PPM.getBattVoltage(),
+                      PPM.getSystemVoltage());
+        Serial.printf("BUS STATE:%d STR:%s\n", PPM.getBusStatus(), PPM.getBusStatusString());
+        Serial.printf("CHG STATE:%d STR:%s CURRENT:%04dmA\n", PPM.chargeStatus(), PPM.getChargeStatusString(), PPM.getChargeCurrent());
         Serial.printf("[%lu]", millis() / 1000);
         Serial.println("----------------------------------------------------------------------------------");
         cycleInterval = millis() + 1000;
diff --git a/examples/SY6970_Shutdown_Example/SY6970_Shutdown_Example.ino b/examples/SY6970_Shutdown_Example/SY6970_Shutdown_Example.ino
index 1b51be5..e060e94 100644
--- a/examples/SY6970_Shutdown_Example/SY6970_Shutdown_Example.ino
+++ b/examples/SY6970_Shutdown_Example/SY6970_Shutdown_Example.ino
@@ -8,7 +8,7 @@
  */
 #include <XPowersLib.h>
 
-PowersSY6970 PMU;
+XPowersPPM PPM;
 
 
 #ifndef CONFIG_PMU_SDA
@@ -34,10 +34,10 @@ void setup()
     Serial.begin(115200);
     while (!Serial);
 
-    bool result =  PMU.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
+    bool result =  PPM.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
     if (result == false) {
         while (1) {
-            Serial.println("PMU is not online...");
+            Serial.println("PPM is not online...");
             delay(50);
         }
     }
@@ -54,9 +54,9 @@ void loop()
             // The shutdown function can only be used when the battery is connected alone, 
             // and cannot be shut down when connected to USB.
             // It can only be powered on in the following two ways:
-            // 1. Press the PMU/QON button
+            // 1. Press the /QON button
             // 2. Connect to USB
-            PMU.shutdown();
+            PPM.shutdown();
             countdown = 10000;
         }
         cycleInterval = millis() + 1000;
diff --git a/examples/SY6970_Watchdog_Example/SY6970_Watchdog_Example.ino b/examples/SY6970_Watchdog_Example/SY6970_Watchdog_Example.ino
index 03d87d7..89f709c 100644
--- a/examples/SY6970_Watchdog_Example/SY6970_Watchdog_Example.ino
+++ b/examples/SY6970_Watchdog_Example/SY6970_Watchdog_Example.ino
@@ -8,7 +8,7 @@
  */
 #include <XPowersLib.h>
 
-PowersSY6970 PMU;
+XPowersPPM PPM;
 
 
 #ifndef CONFIG_PMU_SDA
@@ -34,29 +34,29 @@ void setup()
     while (!Serial);
 
 
-    // Begin SY6970 PMU , Default disable watchdog timer
-    bool result =  PMU.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
+    // Begin SY6970 PPM , Default disable watchdog timer
+    bool result =  PPM.init(Wire, i2c_sda, i2c_scl, SY6970_SLAVE_ADDRESS);
 
     if (result == false) {
         while (1) {
-            Serial.println("PMU is not online...");
+            Serial.println("PPM is not online...");
             delay(50);
         }
     }
 
     // Disable battery charge function
-    PMU.disableCharge();
+    PPM.disableCharge();
 
     /*
     * Example:
-    *   PMU.enableWatchdog( SY6970_WDT_TIMEROUT_40SEC );
+    *   PPM.enableWatchdog( SY6970_WDT_TIMEROUT_40SEC );
     * Optional parameters:
     *   SY6970_WDT_TIMEROUT_40SEC,      //40 Second
     *   SY6970_WDT_TIMEROUT_80SEC,      //80 Second
     *   SY6970_WDT_TIMEROUT_160SEC,     //160 Second
     * * */
-    // Enabale SY6970 PMU watchdog function ,default timer out 40 second
-    PMU.enableWatchdog();
+    // Enable SY6970 PPM watchdog function ,default timer out 40 second
+    PPM.enableWatchdog();
 
 }
 
@@ -64,9 +64,9 @@ void setup()
 
 void loop()
 {
-    // Feed watchdog , If the dog is not fed, the PMU will restart after a timeout, and all PMU settings will be restored to their default values
+    // Feed watchdog , If the dog is not fed, the PPM will restart after a timeout, and all PPM settings will be restored to their default values
     Serial.print(millis() / 1000); Serial.println(" Second");
-    PMU.feedWatchdog();
+    PPM.feedWatchdog();
     delay(1000);
 }