UC3845DTR

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Texas Instruments

SINGLE ENDED 500KHZ CURRENT MODE PWM CONTROLLER WITH 8.4V/7.6V UVLO 50% DUTY CYCLE, 0C TO 70C

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DocumentsDN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty DN-27 UC1842/UC1842A Family - Summary of Functional Differences +13

UC3845DTR

Active

Texas Instruments

SINGLE ENDED 500KHZ CURRENT MODE PWM CONTROLLER WITH 8.4V/7.6V UVLO 50% DUTY CYCLE, 0C TO 70C

Deep-Dive with AI

DocumentsDN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty DN-27 UC1842/UC1842A Family - Summary of Functional Differences +13

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC3845DTR

Applications	PWM Controller
Current - Supply	11 mA
Mounting Type	Surface Mount
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	14-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Voltage - Input [Max]	6.3 V
Voltage - Input [Min]	-3 V
Voltage - Supply [Max]	28 V
Voltage - Supply [Min]	12 V

UC3845A Series

30V,1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0°C to 70°C

Part	Mounting Type	Package / Case [x]	Package / Case [y]	Package / Case	Voltage - Supply [Max]	Voltage - Supply [Min]	Applications	Operating Temperature [Max]	Current - Supply	Voltage - Input [Min]	Voltage - Input [Max]	Supplier Device Package	Package / Case	Package / Case
Texas Instruments UC3845DTR	Surface Mount	0.154 in	3.9 mm	14-SOIC	28 V	12 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V
Texas Instruments UC3845D8	Surface Mount	0.154 in	3.9 mm	8-SOIC	28 V	12 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	8-SOIC
Texas Instruments UC3845NG4	Through Hole			8-DIP	28 V	12 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	8-PDIP	0.3 in	7.62 mm
Texas Instruments UC3845AD8	Surface Mount	0.154 in	3.9 mm	8-SOIC	30 VDC	7.6 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	8-SOIC
Texas Instruments UC3845ADTR	Surface Mount	0.154 in	3.9 mm	14-SOIC	30 VDC	7.6 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V
Texas Instruments UC3845AN	Through Hole			8-DIP	30 VDC	7.6 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	8-PDIP	0.3 in	7.62 mm
Texas Instruments UC3845ANG4	Through Hole			8-DIP	30 VDC	7.6 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	8-PDIP	0.3 in	7.62 mm
Texas Instruments UC3845DG4	Surface Mount	0.154 in	3.9 mm	14-SOIC	28 V	12 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V
Texas Instruments UC3845ADWTR	Surface Mount	0.295 in	7.5 mm	16-SOIC	30 VDC	7.6 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V	16-SOIC
Texas Instruments UC3845DTRG4	Surface Mount	0.154 in	3.9 mm	14-SOIC	28 V	12 V	PWM Controller	70 °C	11 mA	-3 V	6.3 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.03
		10	$ 0.92
		25	$ 0.87
		100	$ 0.72
		250	$ 0.67
		500	$ 0.59
		1000	$ 0.47
	Digi-Reel®	1	$ 1.03
		10	$ 0.92
		25	$ 0.87
		100	$ 0.72
		250	$ 0.67
		500	$ 0.59
		1000	$ 0.47
	Tape & Reel (TR)	2500	$ 0.44
		5000	$ 0.42
		12500	$ 0.40
		25000	$ 0.39
Texas Instruments	LARGE T&R	1	$ 0.86
		100	$ 0.67
		250	$ 0.49
		1000	$ 0.35

Description

General part information

UC3845A Series

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.