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A3948SB Datasheet(PDF) 2 Page - Allegro MicroSystems

Part # A3948SB
Description  DMOS FULL-BRIDGE PWM MOTOR DRIVER
Download  12 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3948SB Datasheet(HTML) 2 Page - Allegro MicroSystems

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3948
DMOS FULL-BRIDGE
PWM MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2
Copyright © 2001, 2002 Allegro MicroSystems, Inc.
FUNCTIONAL BLOCK DIAGRAM
A3948SB (DIP)
Note that the A3948SLB (SOIC) and A3948SB
(DIP) do not share a common terminal
assignment.
CHARGE PUMP
BANDGAP
VDD
CREG
TSD
UNDER-
VOLTAGE &
FAULT DETECT
CHARGE
PUMP
BANDGAP
REGULATOR
VDD
VBB
+
LOGIC
SUPPLY
VREG
LOAD
SUPPLY
Dwg. FP-048
SLEEP
MODE
RANGE
CONTROL LOGIC
PROGRAMMABLE
PWM TIMER
SENSE
RS
FIXED OFF
BLANK
DECAY
MODE
PHASE
ENABLE
CLOCK
DATA
STROBE
RANGE
REFERENCE
BUFFER &
DIVIDER
CURRENT
SENSE
ZERO
CURRENT
DETECT
OSC
OUTA
OUTB
REF
SERIAL
PORT
VREF
CS
SERIAL PORT
÷
VBB
24
23
22
21
20
19
18
17
16
15
14
13
GROUND
GROUND
RANGE
VREG
OUTB
LOAD
SUPPLY
SENSE
OUTA
MODE
REF
Dwg. PP-069-1A
1
2
3
4
5
6
7
8
9
12
11
10
9
GROUND
GROUND
CP
CP2
CP1
PHASE
VDD
LOGIC
SUPPLY
ENABLE
DATA
CLOCK
STROBE
θ
OSC
CHARGE PUMP
GROUND
GROUND


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