Texas Instruments TL1453CNSR, TL1453CNSLE, TL1453CN, TL1453CDR, TL1453CD Datasheet

TL1453C

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A ± FEBRUARY 1990 ± REVISED DECEMBER 1990

D	Complete PWM Power Control Circuitry		N OR NS PACKAGE
D	Completely Synchronized Operation				(T0P VIEW)
D Internal Undervoltage Lockout Protection			CT		1	16		REF
D	Wide Supply Voltage Range		RT		2	15		SCP
					3	14		IN+ ERROR
D	Oscillator Frequency . . . 500 kHz Max	AMPLIFIERERROR	1{IN+IN±		4	13		IN±}AMPLIFIER 2
D Variable Dead Time Provides Control		1 FEEDBACK			5	12		2 FEEDBACK
	Over Total Range
		1 DEAD-TIME CONTROL			6	11		2 DEAD-TIME CONTROL
D Internal Regulator Provides a Stable 2.5-V
		1 OUTPUT			7	10		2 OUTPUT
	Reference Supply
			GND		8	9		VCC

description

The TL1453C incorporates the functions required in the construction of two pulse-width-modulation control circuits on a single monolithic chip. Designed primarily for power supply control, the TL1453C contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.05 V to 1.45 V. The dead-time control comparator has no offset unless externally altered and may be used to provide 0% to 100% dead time. The on-chip oscillator may be operated by terminating RT (pin 2) and CT (pin 1). During low-VCC conditions, the undervoltage lockout control circuit feature inhibits the output until the internal circuitry is operational.

The TL1453C is characterized for operation from ±20°C to 85°C.

functional block diagram

		VCC		CT	RT
	Vref = 2.5 V	9		1	2
		Reference		Triangle
REF	16
		Voltage		Oscillator
			2 V
	Error Amp.1	2.5 V	1.4 V	PWM Comparator 1
1 IN+	3				7
					1 OUTPUT
1 IN±	4				1
1 FEEDBACK 5
2 FEEDBACK	12 Error Amp.2
2 IN+	14				10
					2 OUTPUT
2 IN±	13		2.5 V
					2
			2.5 V	PWM Comparator 2
SCP 15			UVLO²
					8
			6	11	GND
² UVLO = Undervoltage Lockout Protection			1 DEAD-TIME CONTROL	2 DEAD-TIME CONTROL

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 1990, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

TL1453C

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A ± FEBRUARY 1990 ± REVISED DECEMBER 1990

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

Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . 41	V
Amplifier input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . 20	V
Collector output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . 51	V
Collector output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . 21 mA
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . ±20°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . 260°C

NOTE 1: All voltage values are with respect to network ground terminal.

		DISSIPATION RATING TABLE
	PACKAGE	TA ≤ 25°C	DERATING FACTOR	TA = 85°C
		POWER RATING	ABOVE TA = 25°C	POWER RATING
	N	1000 mW	8 mW/°C	520 mW
	NS	725 mW	5.8 mW/°C	397 mW

recommended operating conditions

	MIN	MAX	UNIT
Supply voltage, VCC	3.6	40	V
Amplifier input voltage, VI	1.05	1.45	V
Collector output voltage, VO		50	V
Collector output current		20	mA
Current into feedback terminal		45	μA
Feedback resistor, RF	100		kΩ
Timing capacitor, CT	150	15000	pF
Timing resistor, RT	5.1	100	kΩ
Oscillator frequency	1	500	kHz
Operating free-air temperature, TA	± 20	85	°C

electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted)

reference section

PARAMETER	TEST CONDITIONS	MIN	TYP²	MAX	UNIT
Output voltage (pin 16)	IO = 1 mA	2.4	2.5	2.6	V
Output voltage change with temperature	TA = ± 20°C to 25°C		± 0.1%	±1%
	TA = 25°C to 85°C		± 0.2%	±1%
Input regulation	VCC = 3.6 V to 40 V		2	12.5	mV
Output regulation	IO = 0.1 mA to 1 mA		1	7.5	mV
Short-circuit output current	VO = 0	3	10	30	mA
² All typical values are at T = 25°C.
A

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TL1453C

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A ± FEBRUARY 1990 ± REVISED DECEMBER 1990

electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) (continued)

undervoltage lockout section

PARAMETER	TEST CONDITIONS		MIN	TYP²	MAX	UNIT
Upper threshold voltage (pin 9)	IOref = 0.1 mA,	TA = 25°C		2.72		V
Lower threshold voltage (pin 9)	IOref = 0.1 mA,	TA = 25°C		2.6		V
Hysteresis (pin 9)	IOref = 0.1 mA,	TA = 25°C	80	120		mV

oscillator section

PARAMETER	TEST CONDITIONS	MIN TYP²	MAX	UNIT
Frequency	CT = 330 pF, RT = 10 kΩ	200		kHz
Standard deviation of frequency	VCC, TA, RT, CT values are constant	10%
Frequency change with voltage	VCC = 3.6 V to 40 V	1%
Frequency change with temperature	TA = ±20°C to 25°C	± 0.4%	± 2%
	TA = 25°C to 85°C	± 0.2%	± 2%

dead-time control section

PARAMETER	TEST CONDITIONS	MIN	TYP²	MAX	UNIT
Input bias current (pins 6 and 11)				1	μA
Input threshold voltage at f = 10kHz (pins 6 and 11)	Zero duty cycle		2.05	2.25	V
	Maximum duty cycle	1.2	1.45

error-amplifier section

PARAMETER	TEST CONDITIONS		MIN	TYP²	MAX	UNIT
Input offset voltage	VO (pins 5 and 12) = 1.25 V				± 6	mV
Input offset current	VO (pins 5 and 12) = 1.25 V				±100	nA
Input bias current	VO (pins 5 and 12) = 1.25 V			160	500	nA
			1.05
Common-mode input voltage range	VCC = 3.6 V to 40 V		to			V
			1.45
Open-loop voltage amplification	RF = 200 kΩ		70	80		dB
Unity-gain bandwidth				1.5		MHz
Common-mode rejection ratio			60	80		dB
Positive output voltage swing			Vref ± 0.1			V
Negative output voltage swing					1	V
Output (sink) current (pins 5 and 12)	VID = ± 0.1 V,	VO = 1.25 V	0.5	1.6		mA
Output (source) current (pins 5 and 12)	VID = 0.1 V,	VO = 1.25 V	± 45	± 70		μA

output section

PARAMETER	TEST CONDITIONS	MIN TYP²	MAX	UNIT
Collector off-state current	VCC = 0, VO = 50 V		10	μA
	VO = 50 V		10
Output saturation voltage	IO = 10 mA	1.2	2	V
Short-circuit output current	VO = 6 V	90		mA
² All typical values are at T = 25°C.
A

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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