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NCP81391MNTXG Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP81391MNTXG Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 13 page NCP81391, NCP81391A www.onsemi.com 2 Figure 2. Simplified Block Diagram DEAD TIME CNTRL LEVEL SHIFT UVLO GLF VCC CGND EN PWM LOGIC 45k VCCD BST VIN PHASE LEVEL SHIFT 45k VSWH PGND Temp Sense SHUTDOWN Clip GH ZCD_EN# VSWH 3.84V For NCP81391/ No resistor for NCP81391A For NCP81391/ No TSD for NCP81391A 3.84V GLD Table 1. PIN LIST AND DESCRIPTIONS Pin No. Symbol Description 1 PHASE Bootstrap Capacitor Return 2 PGND2 Power Ground 3 CGND Signal Ground 4 EN Enable. There is a pull−down resistor to CGND for the NCP81391. No pull−down resistor for NCP81391A. 5 PWM PWM Control Input: PWM = High ³ HS FET is on, LS FET is off PWM = Mid ³ HS FET is off, LS FET is off PWM = Low, ZCD_EN# = High ³ HS FET is off, LS FET is on PWM = Low, ZCD_EN# = Low ³ HS FET is off, LS FET is off when zero current is detected 6 ZCD_EN# Zero Current Detect Control. When this pin is at logic low, low−side FET will turn off when zero inductor current is detected (after a minimum blanking/de−bounce time). There is an internal pull−up resistor. 7 VCC Control Power Supply Input 8 VCCD Driver Power Supply Input 9 NC9 No Connect 10 BST Bootstrap Supply Voltage. Connect a MLCC capacitor of at least 0.1 mF from this pin to PHASE. 11 GH High−Side MOSFET Gate Access. Leave floating. 12 NC12 No Connect 13 VIN13 Conversion Supply Power Input 14 VIN14 Conversion Supply Power Input 15 VIN15 Conversion Supply Power Input |
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