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NCP81243 Datasheet(PDF) 8 Page - ON Semiconductor |
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NCP81243 Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 26 page ![]() NCP81243 www.onsemi.com 8 Table 1. QFN52 PIN LIST DESCRIPTION Pin No. Description Symbol 27 VBOOTA/ADDRA VBOOT and Address AUX rail Input Pin. A resistor to ground on startup is used to VBOOT and address of the auxiliary rail 28 VBOOT/ADDR VBOOT and Address main rail Input Pin. A resistor to ground on startup is used to VBOOT and address of the main rail 29 ICCMAXA ICCMAX Input for auxiliary rail Pin. During start up it is used to program configuration of Internal register with a resistor to ground 30 PWM1A PWM 1 Auxiliary rail output. 30 PWM1A PWM 1 Auxiliary rail output. ICCMAX Input for auxiliary rail Pin. 31 PWM2A PWM 2 Auxiliary rail output. 32 PWM3 PWM 3 Main rail output. 33 PWM2 PWM 2 Main rail output. 34 PWM1 PWM 1 Main output. 35 DRVON Bidirectional gate driver enable for external drivers for both Main and Auxiliary Rails. It should be left floating if unused. 36 ICCMAX ICCMAX Main rail Input Pin. During start up it is used to program configuration of Internal register with a resistor to ground 37 Tsense Temp Sense input for main rail 38 CSN1 Non−inverting input to current balance sense amplifier for Main Rail phase 1 39 CSP1 Non−inverting input to current balance sense amplifier for Main Rail phase 1 40 CSN2 Non−inverting input to current balance sense amplifier for Main rail phase 2 41 CSP2 Non−inverting input to current balance sense amplifier for Main Rail phase 2 42 CSN3 Non−inverting input to current balance sense amplifier for Main Rail phase 2 43 CSP3 Non−inverting input to current balance sense amplifier for Main Rail phase 2 44 CSREF Total output current sense amplifier reference voltage input for Main Rail 45 CSSUM Inverting input of total current sense amplifier for Main Rail output 46 ILIM Over current shutdown threshold setting for Main Rail output. Resistor to CSCOMP to set threshold. 47 CSCOMP Output of total current sense amplifier for Main Rail output 48 COMP Output of the Main Rail error amplifier and the inverting input of the PWM comparator for Main Rail output 49 FB Error amplifier voltage feedback for Main Rail output 50 DIFF Output of the Main Rail differential remote sense amplifier. 51 VSP Differential Output Voltage Sense Positive for mail rail 52 VSN Differential Output Voltage Sense Negative for main rail 53 AGND |
Similar Part No. - NCP81243_17 |
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Similar Description - NCP81243_17 |
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