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ISL6140IBZ-T Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL6140IBZ-T Datasheet(HTML) 7 Page - Intersil Corporation |
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7 / 19 page  7 FN9039.4 ISL6140/ISL6150 Block Diagram Typical Values for a representative system; which assumes: 36V to 72V supply range; 48 nominal; UV = 37V; OV = 71V 1A of typical current draw; 2.5A overcurrent 100µF of load capacitance (CL); equivalent RL of 48Ω (R = V/I = 48V/1A) R1: 0.02Ω (1%) R2: 10Ω (5%) R3: 18kΩ (5%) R4: 562kΩ (1%) R5: 9.09kΩ (1%) R6: 10kΩ (1%) C1: 150nF (25V) C2: 3.3nF (100V) Q1: IRF530 (100V, 17A, 0.11Ω) Applications: Quick Guide to Choosing Component Values (See Block Diagram for reference) This section will describe the minimum components needed for a typical application, and will show how to select component values. (Note that “typical” values may only be good for this application; the user may have to select some component values to match the system). Each block will then have more detailed explanation of how it works, and alternatives. R4, R5, R6 - together set the Under-Voltage (UV) and overvoltage (OV) trip points. When the power supply ramps up and down, these trip points (and their 20mV nominal hysteresis) will determine when the gate is allowed to turn on and off (the UV and OV do not affect the PWRGD output). The input power supply is divided down such that when each pin is equal to the trip point (nominal is 1.223V), the comparator will switch. VUV = 1.223 (R4 + R5 + R6)/(R5 + R6) VOV = 1.223 (R4 + R5 + R6)/(R6) The values of R4 = 562k, R5 = 9.09k, and R6 = 10k will give trip points of UV = 37V and OV = 71V. Q1 - is the FET that connects the input supply voltage to the output load, when properly enabled. It needs to R4 C1 R5 R6 Q1 R2 R1 CL RL GND GND -48V IN -48VOUT LOAD + - + - + - + - + - VCC (INTERNAL VOLTAGE) AND REFERENCE GENERATOR LOGIC AND GATE DRIVE VEE VEE VEE VEE VPG (1.7V) VCB (50mV) VUVL, VOVH (1.223V) VCC VPG (1.7V) VUVL, VOVH VCB (50mV) 8 VDD 1 PWRGD (6140) 7 DRAIN 6 GATE 5 SENSE 4 VEE 3 UV 2 OV 1 PWRGD (6150) C2 R3 + - PWRGD/PWRGD OUTPUT DRIVE ISL6140, ISL6150 |
Similar Part No. - ISL6140IBZ-T |
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Similar Description - ISL6140IBZ-T |
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