3-Phase Power MOSFET Controller for Automotive Applications
A3935
11
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Number Name Function
1 CSP Current-sense input, positive-side
2 VDSTH DC input, drain-to-source monitor threshold voltage
3 LSS Gate-drive source return, low-side
4 GLC Gate-drive C output, low-side
5 SC Load phase C input
6 GHC Gate-drive C output, high-side
7 CC Bootstrap capacitor C
8 GLB Gate-drive B output, low-side
9 SB Load phase B input
10 GHB Gate-drive B output, high-side
11 CB Bootstrap capacitor B
12 GLA Gate-drive A output, low-side
13 SA Load phase A input
14 GHA Gate-drive A output, high-side
15 CA Bootstrap capacitor A
16 VREG Gate drive supply, positive
17 VDRAIN Kelvin connection to MOSFET high-side drains
18 VBOOST Boost supply output
Number Name Function
19 BOOSTS Boost switch, source
20 BOOSTD Boost switch, drain
21 GND Ground, dc supply returns, negative
22 VBAT Battery supply, positive
23 UVFLT VBAT undervoltage fault output
24 OVFLT VBAT overvoltage fault output
25 ¯F¯ ¯A¯ ¯U¯ ¯L¯ ¯T¯ Active-low fault output, primary
26 ALO Gate control input A, low-side
27 AHI Gate control input A, high-side
28 BHI Gate control input B, high-side
29 BLO Gate control input B, low-side
30 CLO Gate control input C, low-side
31 CHI Gate control input C, high-side
32 ENABLE Gate output enable
33 OVSET DC input, overvoltage threshold setting for VBAT
34 CSOUT Current-sense amplifier output
35 VDD Logic supply, nominally +5 V
36 CSN Current-sense input, negative-side
Pin-out Diagram
CB
GLA
SA
GHA
CA
VREG
VDRAIN
VBOOST
ALO
FAULT
OVFLT
UVFLT
VBAT
GND
BOOSTD
BOOSTS
5
6
7
8
9
10
11
12
13
14
15
16
17
18
4
3
32
31
30
29
28
33
34
LSS
GLC
SC
GHC
CC
GLB
SB
GHB
CSOUT1
OVSET
ENABLE
CHI
CLO
BLO
BHI
2
1
35
36
23
22
21
20
19
24
25
26
27
CSP
VDSTH
CSN
VDD
AHI
Terminal List
