TEXAS INSTRUMENTS UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4 Technical data

	UCC2813 0/ 1/ 2/ 3/ 4/ 5 Q1
	LOW POWER BICMOS CURRENT MODE PWM
	SGLS245C − MAY 2004 − REVISED SEPTEMBER 2007

DQualified for Automotive Applications

DCustomer-Specific Configuration Control Can Be Supported Along With Major-Change Approval

DESD Protection Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)

D100- A Typical Starting Supply Current

D500- A Typical Operating Supply Current

DOperation to 1 MHz

DInternal Soft Start

DInternal Fault Soft Start

DInternal Leading-Edge Blanking of the Current Sense Signal

D1-A Totem-Pole Output

D70-ns Typical Response From Current-Sense to Gate Drive Output

D1.5% Tolerance Voltage Reference

DSame Pinout as UC3802, UC3842, and UC3842A

description

The UCC2813-0/-1/-2/-3/-4/-5 family of high-speed low-power integrated circuits contain all of the control and drive components required for off-line and dc-to-dc fixed-frequency current-mode switching power supplies with minimal parts count.

These devices have the same pin configuration as the UC2842/3/4/5 family and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC2813-0/-1/-2/-3/-4/-5 family offers choice of maximum duty cycle and critical voltage levels. Lower reference parts, such as the UCC2813-3 and UCC2813-5, fit best into battery-operated systems, while the higher reference and the higher undervoltage lockout (UVLO) hysteresis of the UCC2813-2 and UCC2813-4 make these ideal choices for use in off-line power supplies.

The UCC2813-x series is specified for the automotive temperature range of −40 _C to 125_C.

PART NUMBER	MAXIMUM DUTY CYCLE	REFERENCE VOLTAGE	TURN-ON THRESHOLD	TURN-OFF THRESHOLD
UCC2813-0	100%	5 V	7.2 V	6.9 V
UCC2813-1	50%	5 V	9.4 V	7.4 V
UCC2813-2	100%	5 V	12.5 V	8.3 V
UCC2813-3	100%	4 V	4.1 V	3.6 V
UCC2813-4	50%	5 V	12.5 V	8.3 V
UCC2813-5	50%	4 V	4.1 V	3.6 V

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.	Copyright 2007 Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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UCC2813 0/ 1/ 2/ 3/ 4/ 5 Q1
LOW POWER BICMOS CURRENT MODE PWM
SGLS245C − MAY 2004 − REVISED SEPTEMBER 2007

block diagram

AVAILABLE OPTIONS†‡
TA	ORDERABLE PART
	NUMBER
	UCC2813QDR-0Q1
	UCC2813QDR-1Q1
	UCC2813QDR-2Q1
−40 _C to 125_C
	UCC2813QDR-3Q1
	UCC2813QDR-4Q1
	UCC2813QDR-5Q1
	UCC2813QPWR-3Q1

− − −

D PACKAGE (TOP VIEW)

COMP			1	8		REF
FB			2	7		VCC
CS			3	6		OUT
RC			4	5		GND

TSSOP-8 PW PACKAGE

(TOP VIEW)

†For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.

‡Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

COMP			1	8			REF
FB			2	7			VCC
CS			3	6			OUT
RC			4	5			GND

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								UCC2813 0/ 1/ 2/ 3/ 4/ 5 Q1
								LOW POWER BICMOS CURRENT MODE PWM
								SGLS245C − MAY 2004 − REVISED SEPTEMBER 2007
ordering information
UCC2813- Q		D R 0
								Product Option
								0 through 5
								Tape and Reel Indicator
								Package
								D = Plastic SOIC, PW = Plastic TSSOP
								Automotive Temperature Range Indicator

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡

	V	CC	voltage w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 12 V
	V		current w	30 mA
		CC
	Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . . . . . . . ±1 A
	Output energy (capacitive load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . . . . . . 20 J
	Analog inputs (FB, CS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			−0.3 V to 6.3 V
	Power dissipation at TA < +25_C (D package) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			. . . . . . . 0.65 W
	Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .			−65 _C to 150_C
	Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . .			. . . . . . . 300_C

†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

‡ Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals.

wIn normal operation VCC is powered through a current limiting resistor. Absolute maximum of 12 V applies when VCC is driven from a low impedance source such that ICC does not exceed 30 mA (which includes gate drive current requirement).

electrical characteristics TA = −40 _C to 125_C, VCC = 10 V (see Note 1), RT = 100 kΩ from REF to

RC, CT = 330 pF from RC to GND, 0.1-F capacitor from VCC to GND, 0.1-F capacitor from VREF to GND, and TA = TJ (unless otherwise noted)

	PARAMETER	TEST CONDITIONS		MIN	TYP	MAX	UNIT
	Reference Section
	Output voltage	TJ = 25_C, I = 0.2 mA	UCC2813-0/-1/-2/-4	4.925	5	5.075	V
			UCC2813-3/-5	3.94	4	4.06
	Load regulation voltage	I = 0.2 mA to 5 mA			10	30	mV
	Total variation voltage	See Note 5	UCC2813-0/-1/-2/-4	4.84	5	5.1	V
			UCC2813-3/-5	3.84	4	4.08
	Output noise voltage	f = 10 Hz to 10 kHz,	TJ = 25_C		70		V
		See Note 7
	Long term stability	1000 hours,	TA = 125_C		5		mV
		See Note 7
	Output short-circuit current			−5		−35	mA

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3

UCC2813 0/ 1/ 2/ 3/ 4/ 5 Q1
LOW POWER BICMOS CURRENT MODE PWM

SGLS245C − MAY 2004 − REVISED SEPTEMBER 2007

electrical characteristics TA = −40 _C to 125_C, VCC = 10 V (see Note 1), RT = 100 kΩ from REF to

RC, CT = 330 pF from RC to GND, 0.1 F capacitor from VCC to GND, 0.1 F capacitor from VREF to GND and TA = TJ (unless otherwise noted)

PARAMETER	TEST CONDITIONS				MIN	TYP	MAX	UNIT
Oscillator Section
Oscillator frequency	See Note 2			UCC2813-0/-1/-2/-4	40	46	52	kHz
				UCC2813-3/-5	26	31	36
Temperature stability	See Note 7					2.5		%
Amplitude, peak to peak					2.25	2.4	2.55	V
Oscillator peak voltage						2.45		V
Error Amplifier Section
Input voltage	COMP = 2.5 V			UCC2813-0/-1/-2/-4	2.42	2.5	2.56	V
	COMP = 2.0 V			UCC2813-3/-5	1.92	2	2.05
Input bias current					−2		2	A
Open loop voltage gain					60	80		dB
COMP sink current	FB = 2.7 V,	COMP = 1.1 V			0.3		3.5	mA
COMP source current	FB = 1.8 V,	COMP = REF − 1.2 V			−0.2	−0.5	−0.8	mA
Gain bandwidth product	See Note 7					2		MHz
PWM Section
Maximum duty cycle				UCC2813-0/-2/-3	97	99	100	%
				UCC2813-1/-4/-5	48	49	50
Minimum duty cycle	COMP = 0 V						0	%
Current Sense Section
Gain	See Note 3				1.1	1.65	1.8	V/V
Maximum input signal	COMP = 5 V,	See Note 4			0.9	1	1.1	V
Input bias current					−200		200	nA
CS blank time					50	100	150	ns
Over-current threshold voltage					1.32	1.55	1.7	V
COMP to CS offset voltage	CS = 0 V				0.45	0.9	1.35	V
Output Section (OUT)
	IOUT = 20 mA			All parts		0.1	0.4
Low-level output voltage	IOUT = 200 mA			All parts		0.35	0.9	V
	IOUT = 50 mA,	VCC = 5 V		UCC2813-3/-5		0.15	0.4
	IOUT = 20 mA,	VCC = 0 V		All parts		0.7	1.2
	IOUT = −20 mA			All parts		0.15	0.4
High-level output voltage, VSAT (VCC − OUT)	IOUT = −200 mA			All parts		1	1.9	V
	IOUT = −50 mA,	V CC = 5 V	UCC2813-3/-5			0.4	0.9
Rise time	CL = 1 nF					41	70	ns
Fall time	CL = 1 nF					44	75	ns

4	POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

	UCC2813 0/ 1/ 2/ 3/ 4/ 5 Q1
	LOW POWER BICMOS CURRENT MODE PWM
	SGLS245C − MAY 2004 − REVISED SEPTEMBER 2007

electrical characteristics TA = −40 _C to 125_C, VCC = 10 V (see Note 1), RT = 100 kΩ from REF to

RC, CT = 330 pF from RC to GND, 0.1 F capacitor from VCC to GND, 0.1 F capacitor from VREF to GND, and TA = TJ (unless otherwise noted)

PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
Undervoltage Lockout Section
			UCC2813-0	6.6	7.2	7.8
Start threshold	See Note 6		UCC2813-1	8.6	9.4	10.2	V
			UCC2813-2/-4	11.5	12.5	13.5
			UCC2813-3/-5	3.7	4.1	4.5
			UCC2813-0	6.3	6.9	7.5
Stop threshold	See Note 6		UCC2813-1	6.8	7.4	8	V
			UCC2813-2/-4	7.6	8.3	9
			UCC2813-3/-5	3.2	3.6	4
			UCC2813-0	0.12	0.3	0.48
Start to stop hysteresis			UCC2813-1	1.6	2	2.4	V
			UCC2813-2/-4	3.5	4.2	5.1
			UCC2813-3/-5	0.2	0.5	0.8
Soft-Start Section
COMP rise time	FB = 1.8 V,	Rise from 0.5 V to REF − 1 V			4	10	ms
Overall
Start-up current	VCC < Start hreshold				0.1	0.23	mA
Operating supply current	FB = 0 V,	CS = 0 V,	RC = 0 V		0.5	1.2	mA
VCC internal zener voltage	ICC = 10 mA,	See Notes 6 and 8		12	13.5	15	V
VCC internal zener voltage minus start	See Note 6		UCC2813-2/-4	0.5	1.0		V
threshold voltage

NOTES: 1. Adjust VCC above the start threshold before setting at 10 V.

2.Oscillator frequency for the UCC2813-0, UCC2813-2, and UCC2813-3 is the output frequency. Oscillator frequency for the UCC2813-1, UCC2813-4, and UCC2813-5 is twice the output frequency.

3. Gain is defined by:	A =	DVCOMP 0 v VCS v 0.8 V.
		DVCS

4.Parameter measured at trip point of latch with pin 2 at 0 V.

5.Total variation includes temperature stability and load regulation.

6.Start threshold, stop threshold, and Zener shunt thresholds track one another.

7.Not production tested

8.The device is fully operating in clamp mode as the forcing current is higher than the normal operating supply current.

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