HP PROBOOK 440 G2 RT8243A (8A) STEP DOWN IC Details

HP PROBOOK 440 G2 RT8243A (8A) STEP DOWN IC 1. PIN NO. 11 - VIN- 19V—————————INPUT 2. PIN NO. 12 - ENLDO - 3.17V——————INPUT 3. PIN NO. 15/14 — 3.3V LDO/ 5V LDO ————- INPUT/OUTPUT 4. PIN NO. 3: TON - TIME ON SELECTOR- FREQUENCY SETTINGS PIN - RESISTOR GROUND 5. PIN NO. 13 : ENM - MASTER ENABLE - 3.3V (SELF ENABLE) EXTERNAL PULL OF OF 3V LDO 6. PIN NO. 2/4: ENTRIP : 1.96V AND 1.74V 7. PIN NO. 7/19 : BEFORE ENABLE VOLTAGE - 4.8V,, AFTER ENABLE VOLTAGE - 24V(CHECK BY DSO) 8. SWITCHING START ( GATE FIRING) 9. OUTPUT 10. FEEDBACK —- PROPER CONNECTIVITY — PIN NO. 1/5 -2V 11. POWERGOOD- PIN NO. 6: 3.3V