a4930 Allegro MicroSystems, Inc., a4930 Datasheet - Page 8

• Manufacturer Part Number: a4930
• Description: A4930 Single Phase Fan Pre-driver
• Manufacturer: Allegro MicroSystems, Inc.

A4930
Terminal List
Number
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
VREG5
SENSE
CPWM
Name
CDEL
VREF
SMIN
PWM
GND
CLD
SIN
RD
HN
FG
HP
SS
Regulator decoupling terminal
Capacitor to set Lock Detect Time
FG output, fan speed indicator (open drain)
RD output, high for locked rotor condition (open
drain)
Hall input positive
Hall input negative
Commutation delay
PWM input
Capacitor to set internal frequency
Speed analog input/adjusted PWM output
Minimum speed analog input
Connection for soft start capacitor
Current limit setpoint
Ground
Sense resistor connection
Description
VREG5
CDEL
CLD
RD
HN
FG
HP
1
2
3
4
5
6
7
Pin-out Diagram
PAD
Number
16
17
18
19
20
21
22
23
24
25
26
27
28
–
Single Phase Fan Pre-Driver
21
20
19
18
17
16
15
VREG8 Gate drive supply
Name
GHB
GND
GLB
GHA
VCP
VBB
GLA
CP1
CP2
Pad
NC
SB
SA
SA
GHB
SB
VREG8
GLA
GLB
SENSE
Low-side drive for external N-channel MOSFET
Low-side drive for external N-channel MOSFET
High-side source connection
High-side drive for external N-channel MOSFET
High-side source connection
High-side drive for external N-channel MOSFET
Ground
Charge pump capacitor terminal
Charge pump capacitor terminal
Reservoir capacitor terminal
Supply voltage
Not connected
Thermal pad, connect to GND plane with vias to
bottom of PCB
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Description
8