Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - ELCs High side SOIC 8

UC17131/2/3

UC27131/2/3

UC37131/2/3

SLUS340 - APRIL 1999

FEATURES

• 300mA Continuous Output Current

• Low Side or High Side Switch

Configuration

• 8V to 65V Operation

• Overload and Short Circuit Protection

• Power Interruption Protection

• +6V Regulated Voltage

• 2mA Quiescent Current

• Programmable Overcurrent and

Power Interruption Protection

• 1% to 30% Programmable Input

Comparator Hysteresis (on UC37132)

• Low and High Side Internal High

Current Clamps When Driving

Inductive Loads

Smart Power Switch

11VREF

7VCC

CSH

CSL

2GND

PRE-REGULATOR

INPUT

COMPARATOR

1/2

VREF

HYST

LED

TURN-ON/OFF

AND

SHORT CIRCUIT

PROTECTION

4HS

OUT

72V

6V/8mA

CDEL

UC37132 BLOCK DIAGRAM

UDG-98026

DESCRIPTION

The UC37131, UC37132 and UC37133 are a family of smart power

switches which can drive resistive or inductive loads from the high side or

low side.

The UC37132 is available in 14 pin (DIP), 16 pin (SOIC), or 20 pin (CLCC)

packages and can accommodate both low side (load to VCC) or high side

(load to GND) configurations. The UC37131 and UC37133 are exclusively

for a low side or a high side configuration respectively and both are avail-

able in an 8 pin package. Both high side and low side configurations provide

high current switching with low saturation voltages which can drive resistive

or inductive loads.

The input to the switch is driven by a low voltage signal, typically 5V. Addi-

tionally, UC37132 features adjustable hysteresis. The output of the device

can switch a load between 8V and 65V. Output current capability is 300mA

continuous or 700mA peak.

The device also has inherent smart features that allow for programmable

turn-on delay in enabling the output following startup. The same capacitor

that specifies the turn-on delay is also used to program a VCC power inter-

ruption time. If VCC drops below a threshold for a time specified by this ca-

pacitor, the output is turned off and a new turn-on delay will be re-triggered.

Similarly, if high current persists longer than the response delay, the output

driver will operate in a very low duty cycle mode to protect the IC.

Summary of content (13 pages)

PAGE 1
UC17131/2/3 UC27131/2/3 UC37131/2/3 Smart Power Switch FEATURES DESCRIPTION • 300mA Continuous Output Current The UC37131, UC37132 and UC37133 are a family of smart power switches which can drive resistive or inductive loads from the high side or low side.
PAGE 2
UC17131/2/3 UC27131/2/3 UC37131/2/3 UC37131 BLOCK DIAGRAM VREF 6V PRE-REGULATOR 3 8 VCC 7 LS 6 CSL 5 GND 6V/8mA INPUT COMPARATOR 4 IN 72V HYST (FIXED) = 30% Q OUT TURN-ON/OFF AND SHORT CIRCUIT PROTECTION 1/2 VREF 1 2 LED CDEL UDG-98059 UC37133 BLOCK DIAGRAM VREF 6V PRE-REGULATOR 3 8 VCC 7 CSH 6 HS 5 GND 6V/8mA IN INPUT COMPARATOR 4 HYST (FIXED) = 30% 72V Q OUT TURN-ON/OFF AND SHORT CIRCUIT PROTECTION 1/2 VREF 1 2 LED CDEL UDG-98060 2
PAGE 3
UC17131/2/3 UC27131/2/3 UC37131/2/3 CONNECTION DIAGRAMS ABSOLUTE MAXIMUM RATINGS VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V LS – HS (Clamped by internal circuitry) . . . . . . . . . . . . . . . 78V CSH, LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V Output Current Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mA Peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
UC17131/2/3 UC27131/2/3 UC37131/2/3 ELECTRICAL CHARACTERISTICS Unless otherwise specified, CDEL = 10nF, VCC = 25V, CSL = GND, CSH = LS; RCSH = 0.5Ω (Note 1); IN=0V (for OFF condition) and IN=5V (for ON condition); TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 25°C 5.8 6 6.2 V –55°C to 125°C 5.6 6 6.4 V Reference VREF Line Regulation VCC = 8V to 64V 10 35 mV Load Regulation 0 < IREF < 8mA 10 50 mV Short Circuit Current REF = 0V 20 35 mA 3 3.
PAGE 5
UC17131/2/3 UC27131/2/3 UC37131/2/3 ELECTRICAL CHARACTERISTICS Unless otherwise specified, CDEL = 10nF, VCC = 25V, CSL = GND, CSH = LS; RCSH = 0.5Ω (Note 1); IN=0V (for OFF condition) and IN=5V (for ON condition); TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 5.0 8.0 11.0 mA 1 5 µA 3 6 µs LED Output ISINK, tDOFF, tROFF VLED = 7V ILEAKAGE Overall Delay to Output ICC Output Off 2.0 2.8 mA IL = 1mA, 250mA (High Side) 2.3 3 mA IL = 1mA, 250mA (Low Side) 2.
PAGE 6
UC17131/2/3 UC27131/2/3 UC37131/2/3 DESCRIPTION OF OPERATION Reference current of approximately 4µA. If the power stays off longer than this time, then a power up delay will be initialized once power is resumed. This delay is the time it takes for CDEL to charge from 0V to VFAULT_H of 4.9V. The UC37131/2/3 family of devices features a 6V bandgap reference that is used to bias on-chip logic. Although the 6V reference is not trimmed, this bandgap reference provides less than 200ppm/°C.
PAGE 7
UC17131/2/3 UC27131/2/3 UC37131/2/3 APPLICATION INFORMATION ence an indeterminate state during this interruption, but resume normal operation when VCC power returns to normal. Choosing The CDEL Capacitor The maximum amount of time that VCC power can be interrupted and not require the outputs to go through a turn-on delay cycle is user programmable by the CDEL capacitor value. While VCC is interrupted, the outputs will be in an indeterminate state and they may turn off during this interval, tINT.
PAGE 8
UC17131/2/3 UC27131/2/3 UC37131/2/3 APPLICATION INFORMATION (cont.) VREF VCC 6V PRE-REGULATOR 11 7 +L ICC CREF 6 CSH CCC LOAD LS 5 IN INPUT COMPARATOR 13 OUT 72V POWER SUPPLY VREF Q OUT GND HS 4 TURN-ON/OFF AND SHORT CIRCUIT PROTECTION 1/2 VREF CSL 3 RCSL 2 GND –L IGND 12 HYST 9 10 LED CDEL CCDEL RHYST UDG-98028 Figure 2b. Low side application. tINT VCC t VCDEL_MAX = 5.8V VCDEL VFAULT_H VFAULT_H = 4.
PAGE 9
UC17131/2/3 UC27131/2/3 UC37131/2/3 APPLICATION INFORMATION (cont.) tINT VCC t VCDEL_MAX = 5.8V VCDEL VFAULT_L = 1.0V VFAULT_H VFAULT_H = 4.9V t tD(OFF) tD(ON) tD(ON) OUTPUT DRIVER DISABLED DISABLED ENABLED ENABLED t t LED INDETERMINATE STATE UDG-98030 Figure 3b. Power interrupt fault operation, high side configuration, VIN = 5VDC. ILOAD t 4.9V VCDEL t tSC OUTPUT DRIVER t tR(OFF) LED t UDG-98031 Figure 3c. Overcurrent fault operation.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 21-Mar-2013 Orderable Device Status (1) UC37133NG4 ACTIVE Package Type Package Pins Package Qty Drawing PDIP P 8 50 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) CU NIPDAU N / A for Pkg Type (4) 0 to 70 UC37133N (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 13
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.