Texas Instruments UC39432N, UC39432DTR, UC39432D, UC39432BN, UC39432BDTR Datasheet

Precision Analog Controller

UC19432

UC29432

UC39432

UC39432B

FEATURES

∙Programmable Transconductance for Optimum Current Drive

∙Accessible 1.3V Precision Reference

∙Both Error Amplifier Inputs Available

∙0.7% Overall Reference Tolerance

∙0.4% Initial Accuracy

∙2.2V to 36.0V Operating Supply Voltage and User Programmable Reference

∙Reference Accuracy Maintained for Entire Range of Supply Voltage

∙Superior Accuracy and Easier Compensation for Optoisolator Application

∙Low Quiescent Current (0.50mA Typ)

DESCRIPTION

The UC39432 is an adjustable precision analog controller with 100mA sink capability if the ISET pin is grounded. A resistor between ISET and ground will modify the transconductance while decreasing the maximum current sink. This will add further control in the optocoupler configuration. The trimmed precision reference along with the non-inverting error amplifier inputs are accessible for custom configuration. A sister device, the UC39431 adjustable shunt regulator, has an on-board resistor network providing six preprogrammed voltage levels, as well as external programming capability.

BLOCK DIAGRAM

UDG-95093

03/99

ABSOLUTE MAXIMUM RATINGS

Supply Voltage: VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V

Regulated Output: VCOLL. . . . . . . . . . . . . . . . . . . . . . . . . . . 36V EA Input: SENSE, EA+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V

EA Compensation: COMP. . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Reference Output: REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V

Output Sink Current: ICOLL . . . . . . . . . . . . . . . . . . . . . . . 140mA Output Source Current: ISET . . . . . . . . . . . . . . . . . . . . –140mA

Power Dissipation at TA ≤ 25°C (DIL-8) . . . . . . . . . . . . . . . . 1W Derate 8mW/°C for T A > 25°C

Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C

Currents are positive into, negative out of the specified terminal. Consult Packaging Section of Databook for thermal limitations and considerations of packages.

UC19432

UC29432

UC39432

CONNECTION DIAGRAM

UC39432B

DIL-8, SOIC-8 (Top View)

N or J, D Package

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = –55°C to +125°C and COLL Output = 2.4V to 36.0V for the UC19432, TA = –25°C to +85°C and COLL Output = 2.3V to 36.0V for the UC29432, and T A = 0°C to +70°C and COLL Output = 2.3V to 36.0V for the UC39432, VCC = 15V, I COLL = 10mA, TA = TJ.

PARAMETER	TEST CONDITIONS		MIN	TYP	MAX	UNITS
Reference Voltage Tolerance	TA = 25°C	19432*	1.295	1.3	1.305	V
		39432B	1.29	1.3	1.31	V
Reference Temperature Tolerance	VCOLL = 5.0V	19432*	1.291	1.3	1.309	V
		39432B	1.286	1.3	1.314	V
Reference Line Regulation	VCC = 2.4V to 36.0V, VCOLL = 5V	19432*		10	38	mV
		39432B		10	57	mV
Reference Load Regulation	ICOLL = 10mA to 50mA, VCOLL = 5V	19432*		10	38	mV
		39432B		10	57	mV
Reference Sink Current					10	A
Reference Source Current					–10	A
EA Input Bias Current			–0.5	–0.2		A
EA Input Offset Voltage		19432*			4.0	mV
		39432B			4.0	mV
EA Output Current Sink (Internally Limited)					16	A
EA Output Current Source					–1	mA
Minimum Operating Current	VCC = 36.0V, VCOLL = 5V			0.50	0.80	mA
Collector Current Limit (Note)	VCOLL = VCC = 36.0V, Ref = 1.35V			130	145	mA
	ISET = GND
Collector Saturation	ICOLL = 20mA		0.7	1.1	1.5	V
Transconductance (gm) (Note)	VCC = 2.4V to 36.0V,	19432*	–170	–140	–110	mS
	VCOL = 3V, ICOLL = 20mA	39432B	–180	–140	–100	mS
	ISET = GND
Error Amplifier AVOL			60	90		dB
Error Amplifier GBW	(Note 1)		3.0	5		MHz
Transconductance Amplifier GBW				3		MHz

* Also applies to the UC29432 and UC39432

Note: Programmed transconductance and collector current limit equations are specified in the ISET pin description. Note 1: Guaranteed by design. Not 100% tested in production.

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