5962-8670404PA datasheet, PDF - EEWORLD Datasheet

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5962-8670404PA: DescriptionSwitching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8; CategoryPower/power management The power supply circuit; File Size42KB，4 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com

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5962-8670404PA Overview

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8

5962-8670404PA Parametric

Parameter Name	Attribute value
Maker	Microchip
package instruction	DIP, DIP8,.3
Reach Compliance Code	compli
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	25 V
Minimum input voltage	12 V
Nominal input voltage	15 V
JESD-30 code	R-CDIP-T8
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Maximum output current	1 A
Package body material	CERAMIC, METAL-SEALED COFIRED
encapsulated code	DIP
Encapsulate equivalent code	DIP8,.3
Package shape	RECTANGULAR
Package form	IN-LINE
Certification status	Qualified
Filter level	38535Q/M;38534H;883B
surface mount	NO
Switch configuration	SINGLE
Maximum switching frequency	500 kHz
technology	BIPOLAR
Temperature level	MILITARY
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL

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DN-42A

Design Notes

DESIGN CONSIDERATIONS FOR TRANSITIONING

FROM UC3842 TO THE NEW UCC3802 FAMILY

John Gaumont

In an attempt to stay abreast of trends in the power supply marketplace, the Power Supply Design Engineer

is perpetually seeking methods of improving upon existing designs. Requirements such as lower power for

battery operated equipment, higher switching frequencies for reduced magnetics size, higher levels of circuit

integration for improved reliability and lower cost have become necessities for survival.

The UCC3802 offers numerous advantages which allow the Power Supply Design Engineer to meet these

challenging requirements. Features include:

•

BI-CMOS Process

Low Starting Supply Current: typically 100µA

Low Operating Supply Current: typically 500µA

Pin out Compatible with UC3842 and UC3842A

families

5 Volt Operation (UCC3803, UCC3805)

Leading Edge Blanking of Current Sense Signal

On-Chip Soft Start

Internal Full Cycle Restart Delay

1% Voltage Reference

Up to 1 MHz Oscillator

Self-Biasing Output Low During UVLO

Very Few External Components Required

70ns Response from Current Sense to Output

Available in Surface Mount or DIP Package

Detailed Pin By Pin Description

PIN 1 COMP--The

UCC3802 has a true low output

impedance error amplifier which both sources and

sinks current. The error amplifier associated with

the UC3842 family is an open collector in parallel

with a current source. The UCC3802 has power-up

soft start and fault soft start built on-chip with a fixed

COMP rise time to 5V in 5ms. Therefore,

EXTERNAL SOFT START CIRCUITRY IS

REQUIRED

saving 1 resistor, 1 capacitor, and 1

PNP transistor.

PIN 2 FB--The

UCC3802 features a 2 MHz

bandwidth error amplifier versus 1 MHz on the

UC3842. Feedback techniques are identical to the

UC3842 family. Stray capacitance on FB should be

kept as small as possible, and the lead length as

short as possible to achieve best stability.

P IN 3 C S--The

UCC3802 current sense is

significantly different from its predecessor. The

UC3842 current sense input connects to only the

PWM comparator. The UCC3802 Current Sense

input connects to two comparators; the PWM

comparator and the over-current comparator.

Internal leading edge blanking masks the first 100ns

of the current sense signal. This

MAY ELIMINATE

THE NEED FOR AN RC CURRENT SENSE

FILTER AND PREVENT FALSE TRIGGERING

due to leading edge noise. Connect CS directly to

MOSFET source current sense resistor. The gain

of the current sense amplifier on the UCC3802

family is typically 1.65 V/V versus typically 3 V/V

with the UC3842 family.

The UCC3802 family of devices are pin out

compatible with the UC3842 and UC3842A families

however, they are

NOT PLUG-IN COMPATIBLE.

In general, the UCC3802 requires fewer external

components and consumes less operating current.

The following UCC3802 family attributes should be

considered

BEFORE

inserting the device into a

UC3842/42A family socket:

1. Maximum supply voltage

2. Turn-on and Turn-off thresholds

3. Oscillator Rt, Ct values

4. Schottky diodes may not be required

on output

5. No current sense filter required

6. No soft start circuitry required

7. Auxiliary power (bootstrap winding) may not be

required

11/94

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR

WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER

CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO

BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other

intellectual property right of TI covering or relating to any combination, machine, or process in which such

semiconductor products or services might be or are used. TI’s publication of information regarding any third

party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

1999, Texas Instruments Incorporated

5962-8670404PA Related Products

	5962-8670404PA	5962-8670402PA
Description	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8
Maker	Microchip	Microchip
package instruction	DIP, DIP8,.3	DIP, DIP8,.3
Reach Compliance Code	compli	compliant
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	CURRENT-MODE	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	25 V	25 V
Minimum input voltage	12 V	12 V
Nominal input voltage	15 V	15 V
JESD-30 code	R-CDIP-T8	R-CDIP-T8
Number of functions	1	1
Number of terminals	8	8
Maximum operating temperature	125 °C	125 °C
Minimum operating temperature	-55 °C	-55 °C
Maximum output current	1 A	1 A
Package body material	CERAMIC, METAL-SEALED COFIRED	CERAMIC, METAL-SEALED COFIRED
encapsulated code	DIP	DIP
Encapsulate equivalent code	DIP8,.3	DIP8,.3
Package shape	RECTANGULAR	RECTANGULAR
Package form	IN-LINE	IN-LINE
Certification status	Qualified	Qualified
Filter level	38535Q/M;38534H;883B	38535Q/M;38534H;883B
surface mount	NO	NO
Switch configuration	SINGLE	SINGLE
Maximum switching frequency	500 kHz	500 kHz
technology	BIPOLAR	BIPOLAR
Temperature level	MILITARY	MILITARY
Terminal form	THROUGH-HOLE	THROUGH-HOLE
Terminal pitch	2.54 mm	2.54 mm
Terminal location	DUAL	DUAL

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