MC3425P1 Motorola, MC3425P1 Datasheet

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MC3425P1

Manufacturer Part Number
MC3425P1
Description
Power supply supervisory/over and undervoltage protection circuit
Manufacturer
Motorola
Datasheet

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Power Supply Supervisory/
Over and Undervoltage
Protection Circuit
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–collector output for fault indication.
MAXIMUM RATINGS
NOTE: 1. The input signal voltage should not be allowed to go negative by more than 300 mV
NOTE: 1.
MOTOROLA ANALOG IC DEVICE DATA
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
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
The MC3425 is a power supply supervisory circuit containing all the
Dedicated Over and Undervoltage Sensing
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
V in
Maximum Power Dissipation @ T A = 70 C
Thermal Resistance, Junction–to–Air
or positive by more than 40 V, independent of V CC , without device destruction.
Overvoltage Crowbar Protection, Undervoltage Indication
Supply
Power
DC
Rating
C out
Simplified Application
+
MC3425
I OS(DRV)
Symbol
V IND
R JA
V CC
I IND
T stg
V IR
P D
T J
T A
–55 to +150
–0.3 to +40
Internally
0 to +70
Limited
0 to 40
Value
1000
+150
40
30
80
Undervoltage
Indication
V out
Unit
Vdc
Vdc
Vdc
mW
mA
mA
C/W
C
C
C
POWER SUPPLY SUPERVISORY/
MC3425P1
Motorola, Inc. 1996
Device
OVER AND UNDERVOLTAGE
O.V. Sense
U.V. Sense
O.V. DRV
O.V. DLY
PROTECTION CIRCUIT
Output
ORDERING INFORMATION
PIN CONNECTIONS
SEMICONDUCTOR
Temperature Range
MC3425
TECHNICAL DATA
PLASTIC PACKAGE
Order this document by MC3425/D
1
2
3
4
T A = 0 to +70 C
8
Operating
P1 SUFFIX
CASE 626
(Top View)
1
8
7
6
5
V CC
Gnd
U.V. IND
Output
U.V. DLY
Plastic DIP
Package
Rev 2
1

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MC3425P1 Summary of contents

Page 1

... T J +150 + stg –55 to +150 C O.V. Sense U.V. Sense V out MC3425 Undervoltage Indication Device MC3425P1 Motorola, Inc. 1996 Order this document by MC3425/D MC3425 PROTECTION CIRCUIT SEMICONDUCTOR TECHNICAL DATA SUFFIX PLASTIC PACKAGE CASE 626 PIN CONNECTIONS O.V. DRV Output O ...

Page 2

... H(act 9.0 V OL(DLY) V OH(DLY –0.5 I DLY(source) 140 I DLY(sink) 1.8 I DRV(peak) 200 V OH(DRV –2.5 I DRV(leak) di/dt I DRV(trans) V IND(sat) I IND(leak) V th(OC) 2.33 t PLH(IN/OUT) t PLH(IN//DLY) MOTOROLA ANALOG IC DEVICE DATA Typ Max Unit Vdc 2.5 2.6 2.5 2.63 – 7 – 40 Vdc – 8 – 16 – ...

Page 3

... AMBIENT TEMPERATURE ( C) Figure 5. Output Delay Time versus Delay Capacitance 100 1.0 0.1 t DLY = 0.01 0.001 0.0001 0.001 0.01 0.1 C DLY , DELAY PIN CAPACITANCE ( F) MOTOROLA ANALOG IC DEVICE DATA MC3425 Figure 2. Hysteresis Activation Voltage 1 5.0 V 1.0 0 0.6 0.4 0.2 0 1.2 1.4 1.6 –55 –25 Figure 4 ...

Page 4

... I IND , INDICATOR OUTPUT SINK CURRENT (mA) Figure 10. Power Supply Current 28 Curve O.V. Sense U.V. Sense Gnd 8.0 4 5.0 75 100 125 MOTOROLA ANALOG IC DEVICE DATA versus Voltage Gnd POWER SUPPLY VOLTAGE (V) ...

Page 5

... MC3425 Power 4 U.V. Supply Sense 82k U.V. O.V. DLY DLY Gnd 6.8k 0.1 F MOTOROLA ANALOG IC DEVICE DATA MC3425 APPLICATIONS INFORMATION Figure 12. Overvoltage Protection of 5.0 V Supply with Line Loss Detector +V O +5. Power Supply 15k AC Line 10k 100 U.V. Sense Gnd Pin 4 U.V. DLY R1A Pin 5 ...

Page 6

... Figure 15. Representative Block Diagram 200 A + Output Comparator – O.V. + – Output 200 A Comparator U. 2.5V Reference Regulator Gnd U.V. O.V. DLY DLY 2.5 C DLY = 12500 C DLY = 200 A 1.8 mA and is much greater than the typical 4.0% for the basic device O.V. DRV 1 U.V. IND 6 Output Section MOTOROLA ANALOG IC DEVICE DATA ...

Page 7

... Figure 16. Typical Crowbar Circuit Configurations (A) SCR Across Input of Regulator V in (B) SCR Across Output of Regulator V in MOTOROLA ANALOG IC DEVICE DATA MC3425 CROWBAR SCR CONSIDERATIONS current flows through this turned–on gate region, very high current densities can occur in the gate region if high anode currents appear quickly (di/dt) ...

Page 8

... As an aid in selecting an SCR for crowbar use, the following selection guide is presented. Device MCR310 Series MCR16 Series MCR25 Series 2N6501 Series R MCR69 Series MCR264 Series L MCR265 Series MOTOROLA ANALOG IC DEVICE DATA I RMS I TSM 10 A 100 150 300 300 ...

Page 9

... F –A– NOTE 2 C –T– N SEATING PLANE 0.13 (0.005) M MOTOROLA ANALOG IC DEVICE DATA MC3425 OUTLINE DIMENSIONS P1 SUFFIX PLASTIC PACKAGE CASE 626–05 ISSUE NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. ...

Page 10

... MC3425 NOTES MOTOROLA ANALOG IC DEVICE DATA ...

Page 11

... MOTOROLA ANALOG IC DEVICE DATA MC3425 NOTES 11 ...

Page 12

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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