MP8042 MPS, MP8042 Datasheet - Page 4

• Manufacturer Part Number: MP8042
• Description: High Current, Dual Channel Power Half-bridge
• Manufacturer: MPS

PIN FUNCTIONS
MP8042 Rev. 0.9
9/21/2007
Pin #
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
AGND1 Analog Ground 1.
AGND2 Analog Ground 2.
PGND2 Power Ground 2. Connect the exposed pad on bottom side to the ground plane.
PGND1 Power Ground 1. Connect the exposed pad on bottom side to the ground plane.
FAULT Fault Output. A low output at FAULT indicates that the MP8042 has detected an over
PWM1
PWM2
SHDN
Name
STBY
VDR2
OUT2
VDD2
VDD1
OUT1
VDR1
BST2
BST1
NC
NC
NC
Description
No Connect.
Driver Logic Input 1. Drive PWM1 with the signal that controls the MP8042 OUT1. Drive PWM
high to turn on the high side switch; drive PWM low to turn on the low-side switch.
Standby Input. Default low (internal pull-down). If driven high, the output of drivers is
determined by the PWM1/2. If driven low, the output of both drivers is high impedance.
Driver Logic Input 2. Drive PWM2 with the signal that controls the MP8042 OUT2. Drive PWM
high to turn on the high-side switch; drive PWM low to turn on the low-side switch.
temperature, over current condition or the voltage to the driver is less than 5V. This output is
open drain.
Shutdown Input. When low, both channels will be shut off.
No Connect.
Gate Drive Supply Bypass 2. The voltage at VDR2 is supplied from an internal regulator from
VDD2. VDR2 powers the internal circuitry and internal MOSFET gate drive for the OUT2
stage. Bypass VDR2 to AGND2 with a 0.1µF to 10µF capacitor.
Bootstrap Supply 2. BST2 powers the high-side gate of the OUT2 stage. Connect a 0.1µF or
greater capacitor between BST2 and OUT2.
Switched Output 2. Connect the output LC filter to OUT2. OUT2 is valid approximately 100µs
after VDD2 goes high.
Power Supply Input 2. Connect VDD2 to the positive side of the input power supply. Bypass
VDD2 to AGND2 as close to the IC as possible.
No Connect.
Power Supply Input 1. Connect VDD1 to the positive side of the input power supply. Bypass
VDD1 to GND1 as close to the IC as possible.
Switched Output 1. Connect the output LC filter to OUT1. OUT1 is valid approximately 100µs
after VDD1 goes high.
Bootstrap Supply 1. BST1 powers the high-side gate of the OUT1 stage. Connect a 0.1µF or
greater capacitor between BST1 and OUT1.
Gate Drive Supply Bypass 1. The voltage at VDR1 is supplied from an internal regulator from
VDD1. VDR1 powers the internal circuitry and internal MOSFET gate drive for the OUT1
stage. Bypass VDR1 to AGND1 with a 0.1µF to 10µF capacitor.
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
MP8042 – HIGH CURRENT, DUAL CHANNEL POWER HALF-BRIDGE
© 2007 MPS. All Rights Reserved.
www.MonolithicPower.com
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