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MC3425P1 Datasheet

  • MC3425P1

  • ON Semiconductor [POWER SUPPLY SUPERVISORY/ OVER AND UNDERV...

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Order this document by MC3425/D
MC3425
Power Supply Supervisory/
Over and Undervoltage
Protection Circuit
The MC3425 is a power supply supervisory circuit containing all the
necessary functions required to monitor over and undervoltage fault
conditions. These integrated circuits contain dedicated over and
undervoltage sensing channels with independently programmable time
delays. The overvoltage channel has a high current Drive Output for use in
conjunction with an external SCR Crowbar for shutdown. The undervoltage
channel input comparator has hysteresis which is externally programmable,
and an open鈥揷ollector output for fault indication.
鈥?/div>
Dedicated Over and Undervoltage Sensing
POWER SUPPLY SUPERVISORY/
OVER AND UNDERVOLTAGE
PROTECTION CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Programmable Hysteresis of Undervoltage Comparator
Internal 2.5 V Reference
300 mA Overvoltage Drive Output
30 mA Undervoltage Indicator Output
Programmable Time Delays
4.5 V to 40 V Operation
8
1
P1 SUFFIX
PLASTIC PACKAGE
CASE 626
Symbol
VCC
VIR
IOS(DRV)
VIND
IIND
PD
R
胃JA
TJ
TA
Tstg
Value
40
鈥?.3 to +40
Internally
Limited
0 to 40
30
1000
80
+150
0 to +70
鈥?5 to +150
Unit
Vdc
Vdc
mA
Vdc
mA
mW
掳C/W
掳C
掳C
掳C
O.V. DRV
Output
O.V. DLY
O.V. Sense
U.V. Sense
1
2
3
4
(Top View)
Vout
8
7
6
5
VCC
Gnd
U.V. IND
Output
U.V. DLY
MAXIMUM RATINGS
Rating
Power Supply Voltage
Comparator Input Voltage Range (Note 1)
Drive Output Short Circuit Current
Indicator Output Voltage
Indicator Output Sink Current
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation @ TA = 70掳C
Thermal Resistance, Junction鈥搕o鈥揂ir
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
PIN CONNECTIONS
NOTE:
1. The input signal voltage should not be allowed to go negative by more than 300 mV
NOTE:
1.
or positive by more than 40 V, independent of VCC, without device destruction.
Simplified Application
Overvoltage Crowbar Protection, Undervoltage Indication
Vin
DC
Power
Supply
+
Cout
MC3425
Undervoltage
Indication
Device
ORDERING INFORMATION
Operating
Temperature Range
TA = 0掳 to +70掳C
Package
Plastic DIP
Rev 2
MC3425P1
漏
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1

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