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U6820BM-FP Datasheet

  • U6820BM-FP

  • Dual Quad BCDMOS Driver IC

  • 221.35KB

  • 11頁

  • ATMEL   ATMEL

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Features
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Four Short-circuit-protected High-side Drivers with a Maximum Current Capability of
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50 mA Each
Four Short-circuit-protected Low-side Drivers with a Maximum Current Capability of
50 mA Each
ON Resistance High Side R
on
< 10
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Versus Total Temperature Range
ON Resistance Low Side R
on
< 7
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Versus Total Temperature Range
Short-circuit Detection of Each Driver Stage
Disabling of Driver Stages in the Case of Short-circuit and Overtemperature Detection
Independent Control of Each Driver Stage via an 8-bit Shift Register
Status Output Reports Short-circuit Condition
Status Output Reports when All Loads Are Switched Off
Timing of Status Output Reset Signalizes Failure Mode
Temperature Protection in Conjunction with Short-circuit Detection
Description
The U6820BM is a driver interface in BCDMOS technology with 8 independent driver
stages having a maximum current capability of 50 mA each. Its partitioning into 4
high-side and 4 low-side driver stages allows an easy connection of either 4 half-
bridges or 2 H-bridges on the pc board. The U6820BM communicates with a micro-
controller via an 8-bit serial interface. Integrated protection against short circuit and
overtemperature give added value. EMI protection and 2-kV ESD protection together
with automotive qualification referring to conducted interference (ISO/TR 7637/1)
make this IC ideal for both automotive and industrial applications.
Figure 1.
Block Diagram
V
6
CC
HS4
16
HS3
9
HS2
8
HS1
1
Dual Quad
BCDMOS
Driver IC
U6820BM
Current
limiter
V
14
CC
Current
limiter
Current
limiter
Current
limiter
3
VS
STATUS
CS
CLK
DI
11
12
H
S
4
H
S
3
H
S
2
H
S
1
L
S
4
L
S
3
L
S
2
L
S
1
Thermal protection
Control
logic
V
CC
V
CC
13
Input Register
Power-on reset
V
CC
5
Current
limiter
Current
limiter
Current
limiter
Current
limiter
GND S
4
GND
CC
15
LS4
10
LS3
7
LS2
2
LS1
Rev. 4527A鈥揃CD鈥?3/02
1

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