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MP8040 Datasheet(PDF) 4 Page - Monolithic Power Systems |
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MP8040 Datasheet(HTML) 4 Page - Monolithic Power Systems |
4 / 8 page MP8040 – HIGH CURRENT INTEGRATED HALF BRIDGE + DRIVER MP8040 Rev. 1.5 www.MonolithicPower.com 4 5/3/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. TM PIN FUNCTIONS Pin # Name Description 1 PWM Driver Logic Input. Drive PWM with the signal that controls the MP8040 output. Drive PWM high to turn on the high-side switch; drive PWM low to turn on the low-side switch. 2 SP Power Supply Input. Connect SP to the positive side of the input power supply. Bypass SP to GND as close to the IC as possible. 3 SW Switched Output. SW is the power output of the MP8040. Connect the output LC filter to SW. SW is valid approximately 100µs after SP goes high. 4 GND Ground. (Note: Connect the exposed pad on the bottom side to Pin 4). 5 BS Bootstrap Supply. BS powers the high-side gate of the MP8040. Connect a 0.1µF or greater capacitor between BS and SW. 6 SHDN Shutdown Input. SHDN enables/disables the MP8040. Drive SHDN low to turn on the MP8040, drive it high to turn it off. If not used, connect SHDN to GND. 7 DRV Gate Drive Supply Bypass. The voltage at DRV is supplied from an internal regulator from SP. DRV powers the internal circuitry and internal MOSFET gate drives. Bypass DRV to GND with a 0.1µF to 10µF capacitor. 8 FLT Fault Output. Active-low, open drain. A low output at FLT indicates that the MP8040 has detected a fault and has shutdown. Connect FLT to DRV through a 100kΩ resistor. OPERATION The MP8040 is a general purpose, power driver. It takes a logic input and drives a half bridge comprised of 0.1Ω high-side and low-side N-Channel MOSFET switches. It operates at frequencies up to 1.2MHz, can accept a DC supply voltage as high as 25V, and produce peak output current as high as 9A. HI DRIVE LO DRIVE CURRENT LIMIT & FEEDBACK BS UVLO THERMAL SHUTDOWN UVLO INTERNAL 5V REG. LOGIC DBS 8 6 1 7 5 2 3 4 DRV PWM FLT SHDN BS SP SW GND MP8040_F02 Figure 1—Function Block Diagram |
Número de pieza similar - MP8040 |
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Descripción similar - MP8040 |
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