diff --git a/src/device/gpio.rs b/src/device/gpio.rs
index f8b830c..aefea69 100644
--- a/src/device/gpio.rs
+++ b/src/device/gpio.rs
@@ -1,6 +1,6 @@
 use crate::laser_diode::ld_ctrl::{self, LdCtrlPhy};
 use crate::laser_diode::max5719;
-use crate::laser_diode::analog_wdg::LdAnalogWdgPhy;
+use crate::laser_diode::ld_pwr_exc_protector::LdPwrExcProtectorPhy;
 use crate::thermostat::ad5680;
 use crate::thermostat::max1968::{self, MAX1968PinSet, MAX1968Phy, PWM_FREQ_KHZ};
 use crate::thermostat::ad7172;
@@ -40,7 +40,7 @@ pub fn setup(
     LdCtrlPhy<ld_ctrl::Channel0>,
     ad7172::AdcPhy,
     MAX1968Phy<max1968::Channel0>,
-    LdAnalogWdgPhy
+    LdPwrExcProtectorPhy
 ) {
     let gpioa = gpioa.split();
     let gpiob = gpiob.split();
@@ -84,7 +84,7 @@ pub fn setup(
         current_source_short_pin: gpioa.pa4.into_push_pull_output(),
     };
 
-    let pd_mon_phy = LdAnalogWdgPhy {
+    let pd_mon_phy = LdPwrExcProtectorPhy {
         _pd_mon_ch0: gpioa.pa3.into_analog(),
         pwr_en_ch0: gpiod.pd9.into_push_pull_output(),
     };
diff --git a/src/laser_diode/laser_diode.rs b/src/laser_diode/laser_diode.rs
index 6ce996f..40954b6 100644
--- a/src/laser_diode/laser_diode.rs
+++ b/src/laser_diode/laser_diode.rs
@@ -1,7 +1,7 @@
 use miniconf::Miniconf;
 use stm32f4xx_hal::pac::ADC2;
 use crate::laser_diode::ld_ctrl::LdCtrl;
-use crate::laser_diode::analog_wdg::{LdAnalogWdg, self};
+use crate::laser_diode::ld_pwr_exc_protector::{LdPwrExcProtector, self};
 use core::{marker::PhantomData, f64::NAN};
 
 use uom::si::{
@@ -62,8 +62,8 @@ pub struct LdDrive{
 }
 
 impl LdDrive{
-    pub fn new(current_source: LdCtrl, pins_adc: ADC2, phy: analog_wdg::LdAnalogWdgPhy)-> Self {
-        LdAnalogWdg::setup(pins_adc, phy);
+    pub fn new(current_source: LdCtrl, pins_adc: ADC2, phy: ld_pwr_exc_protector::LdPwrExcProtectorPhy)-> Self {
+        LdPwrExcProtector::setup(pins_adc, phy);
 
         LdDrive {
             ctrl: current_source,
@@ -72,7 +72,7 @@ impl LdDrive{
     }
 
     pub fn setup(&mut self) {
-        LdAnalogWdg::pwr_off();
+        LdPwrExcProtector::pwr_off();
         self.ld_set_i(ElectricCurrent::new::<milliampere>(0.0));
         self.ld_short();
     }
@@ -94,15 +94,15 @@ impl LdDrive{
     }
 
     pub fn power_up(&mut self){
-        LdAnalogWdg::pwr_on_and_arm_protection();
+        LdPwrExcProtector::pwr_on_and_arm_protection();
     }
 
     pub fn power_down(&mut self){
-        LdAnalogWdg::pwr_off();
+        LdPwrExcProtector::pwr_off();
     }
 
     pub fn get_pd_i(&mut self) -> ElectricCurrent {
-        LdAnalogWdg::get_status().v * Settings::PD_MON_TRANSCONDUCTANCE
+        LdPwrExcProtector::get_status().v * Settings::PD_MON_TRANSCONDUCTANCE
     }
 
     pub fn ld_set_i(&mut self, i: ElectricCurrent) -> ElectricCurrent {
@@ -114,27 +114,27 @@ impl LdDrive{
 
     // Set the calibrated VDDA value obtained from ADC1 calibration
     pub fn set_pd_mon_calibrated_vdda(&mut self, val_cal: u32) {
-        LdAnalogWdg::set_calibrated_vdda(val_cal)
+        LdPwrExcProtector::set_calibrated_vdda(val_cal)
     }
 
-    pub fn pd_mon_status(&mut self) -> analog_wdg::Status {
-        LdAnalogWdg::get_status()
+    pub fn pd_mon_status(&mut self) -> ld_pwr_exc_protector::Status {
+        LdPwrExcProtector::get_status()
     }
 
     pub fn pd_mon_clear_alarm(&mut self) {
-        LdAnalogWdg::clear_alarm_status();
+        LdPwrExcProtector::clear_alarm_status();
     }
 
     pub fn set_ld_power_limit(&mut self, pwr_limit: Power){
-        // LdAnalogWdg::set_trigger_threshold_v(convert pwr_limit to raw adc code)
+        // LdPwrExcProtector::set_trigger_threshold_v(convert pwr_limit to raw adc code)
         unimplemented!()
     }
 
     pub fn set_pd_i_limit(&mut self, i: ElectricCurrent){
-        LdAnalogWdg::set_trigger_threshold_v(i / Settings::PD_MON_TRANSCONDUCTANCE);
+        LdPwrExcProtector::set_trigger_threshold_v(i / Settings::PD_MON_TRANSCONDUCTANCE);
     }
 
     pub fn set_pd_v_limit(&mut self, v: ElectricPotential){
-        LdAnalogWdg::set_trigger_threshold_v(v);
+        LdPwrExcProtector::set_trigger_threshold_v(v);
     }
 }
diff --git a/src/laser_diode/analog_wdg.rs b/src/laser_diode/ld_pwr_exc_protector.rs
similarity index 78%
rename from src/laser_diode/analog_wdg.rs
rename to src/laser_diode/ld_pwr_exc_protector.rs
index f76aa71..22bcc12 100644
--- a/src/laser_diode/analog_wdg.rs
+++ b/src/laser_diode/ld_pwr_exc_protector.rs
@@ -18,9 +18,9 @@ pub type LdPwrEnPinType = PD9<Output<PushPull>>;
 pub type PdMonAdcPinType = PA3<Analog>;
 const PD_MON_ADC_CH_ID: u8 = 0x03;
 
-static mut ANALOG_WDG: Option<LdAnalogWdg> = None;
+static mut LD_PWR_EXC_PROTECTOR: Option<LdPwrExcProtector> = None;
 
-pub struct LdAnalogWdgPhy {
+pub struct LdPwrExcProtectorPhy {
     // To make sure Pd Mon Pin is configured to Analog mode
     pub _pd_mon_ch0: PdMonAdcPinType, 
     pub pwr_en_ch0:  LdPwrEnPinType,
@@ -44,20 +44,21 @@ impl Default for Status {
         }
     }
 }
-
-pub struct LdAnalogWdg {
+// power excursion protection
+// LdPwrExcProtector
+pub struct LdPwrExcProtector {
     pac: ADC2,
-    phy: LdAnalogWdgPhy,
+    phy: LdPwrExcProtectorPhy,
     alarm_status: Status,
     //Calibrated VDDA in millivolt from Adc<ADC1>.calibrate() 
     calibrated_vdda: u32, 
 }
 
-impl LdAnalogWdg {
+impl LdPwrExcProtector {
     /// ADC Analog Watchdog is configured to guard a single regular Adc channel on Pd Mon Pin.
     /// ADC is configured to start continuous conversion without using DMA immediately.
     /// Interrupt is disabled by default.
-    pub fn setup(pac_adc: ADC2, mut phy: LdAnalogWdgPhy){
+    pub fn setup(pac_adc: ADC2, mut phy: LdPwrExcProtectorPhy){
         unsafe {
             // All ADCs share the same reset interface.
             // NOTE(unsafe) this reference will only be used for atomic writes with no side effects.
@@ -120,8 +121,8 @@ impl LdAnalogWdg {
         phy.pwr_en_ch0.set_low();
 
         unsafe {
-            ANALOG_WDG = Some(
-                LdAnalogWdg { 
+            LD_PWR_EXC_PROTECTOR = Some(
+                LdPwrExcProtector { 
                     pac: pac_adc, 
                     phy: phy,
                     alarm_status: Status::default(),
@@ -132,18 +133,18 @@ impl LdAnalogWdg {
     }
 
     fn get() -> Option<&'static mut Self> {
-        unsafe { ANALOG_WDG.as_mut() }
+        unsafe { LD_PWR_EXC_PROTECTOR.as_mut() }
     }
 
     fn convert_sample_to_volt(sample :u16) -> ElectricPotential {
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             return ElectricPotential::new::<millivolt>(((u32::from(sample) * wdg.calibrated_vdda) / u32::from(MAX_SAMPLE)) as f64)
         }
         ElectricPotential::new::<millivolt>(0.0)
     }
 
     pub fn set_trigger_threshold_v(htr: ElectricPotential){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             let code: u32 = ((htr / (ElectricPotential::new::<millivolt>(wdg.calibrated_vdda as f64))).get::<ratio>() * (MAX_SAMPLE as f64)) as u32;
             wdg.pac.htr.write(|w| unsafe {w.bits(code)});
             info!("trigger_threshold_v: {:?}", code);
@@ -151,38 +152,38 @@ impl LdAnalogWdg {
     }
 
     pub fn set_calibrated_vdda(val: u32) {
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.calibrated_vdda = val;
         }
     }
 
     pub fn get_status() -> Status {
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
-            wdg.alarm_status.v = LdAnalogWdg::convert_sample_to_volt(wdg.pac.dr.read().data().bits());
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
+            wdg.alarm_status.v = LdPwrExcProtector::convert_sample_to_volt(wdg.pac.dr.read().data().bits());
             return wdg.alarm_status.clone()
         }
         Status::default()
     }
 
     pub fn pwr_on_and_arm_protection(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.alarm_status = Status::default();
-            LdAnalogWdg::pwr_on();
+            LdPwrExcProtector::pwr_on();
             // Interrupt should be enabled after power on to tackle the following edge case:
             //      Pd_Mon pin voltage has already exceed threshold before LD Power is on.
-            LdAnalogWdg::enable_watchdog_interrupt();
+            LdPwrExcProtector::enable_watchdog_interrupt();
         }
     }
 
     pub fn clear_alarm_status(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.alarm_status.pwr_excursion = false;
             wdg.alarm_status.v_tripped = ElectricPotential::new::<millivolt>(0.0);
         }
     }
 
     fn enable_watchdog_interrupt(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.pac.cr1.modify(|_, w| w
                 .awdie().set_bit()
             );
@@ -190,7 +191,7 @@ impl LdAnalogWdg {
     }
 
     fn disable_watchdog_interrupt(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.pac.cr1.modify(|_, w| w
                 .awdie().clear_bit()
             );
@@ -198,7 +199,7 @@ impl LdAnalogWdg {
     }
 
     fn clear_interrupt_bit(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.pac.sr.modify(|_, w| w
                 .awd().clear_bit()
             );
@@ -206,25 +207,25 @@ impl LdAnalogWdg {
     }
 
     fn pwr_on(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.alarm_status.pwr_engaged = true;
             wdg.phy.pwr_en_ch0.set_high()
         }
     }
 
     pub fn pwr_off(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             wdg.alarm_status.pwr_engaged = false;
             wdg.phy.pwr_en_ch0.set_low()
         }
     }
 
     fn power_excursion_handler(){
-        if let Some(ref mut wdg ) = LdAnalogWdg::get() {
+        if let Some(ref mut wdg ) = LdPwrExcProtector::get() {
             let sample = wdg.pac.dr.read().data().bits();
-            LdAnalogWdg::pwr_off();
+            LdPwrExcProtector::pwr_off();
             wdg.alarm_status.pwr_excursion = true;
-            wdg.alarm_status.v_tripped = LdAnalogWdg::convert_sample_to_volt(sample);
+            wdg.alarm_status.v_tripped = LdPwrExcProtector::convert_sample_to_volt(sample);
         }
     }
 }
@@ -232,10 +233,10 @@ impl LdAnalogWdg {
 #[interrupt]
 fn ADC(){
     cortex_m::interrupt::free(|_| {
-            LdAnalogWdg::power_excursion_handler();
+            LdPwrExcProtector::power_excursion_handler();
             // Disable interrupt to avoid getting stuck in infinite interrupt loop
-            LdAnalogWdg::disable_watchdog_interrupt();
-            LdAnalogWdg::clear_interrupt_bit();
+            LdPwrExcProtector::disable_watchdog_interrupt();
+            LdPwrExcProtector::clear_interrupt_bit();
         }
     )
 }
diff --git a/src/laser_diode/mod.rs b/src/laser_diode/mod.rs
index 59f9016..767cdaf 100644
--- a/src/laser_diode/mod.rs
+++ b/src/laser_diode/mod.rs
@@ -2,4 +2,4 @@ pub mod ld_ctrl;
 pub mod max5719;
 pub mod laser_diode;
 pub mod pd_mon;
-pub mod analog_wdg;
\ No newline at end of file
+pub mod ld_pwr_exc_protector;
\ No newline at end of file