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See Technical Specifications

UCC3813D-1

Economy low power BICMOS 1MHz current mode PWM with 9.4V/7.4V UVLO and 50% duty cycle, 0C to 70C

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UCC3813D-1
Datasheet:

UCC3813D-1 Datasheet (PDF)
Topology:

Boost, Flyback
Control mode:

Current
Duty cycle (max) (%):

50
Switching frequency (max) (kHz):

1000
EDA/CAD Models:

Request Free CAD Models for UCC3813D-1

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UCC3813D-1 General Description

The UCC3813-x device family of high-speed, low-power integrated circuits contains 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 UC384x device family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC3813-x device family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Devices with lower reference voltage such as the UCC3813-3 and UCC3813-5 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 device and UCC3813-4 device make these ideal choices for use in off-line power supplies.

The UCC2813-x device series is specified for operation from –40°C to 85°C and the UCC3813-x device series is specified for operation from 0°C to 70°C.

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Key Features

100-µA typical starting supply current
500-µA typical operating supply current
Operation to 1 MHz
Internal soft start
Internal fault soft start
Internal leading-edge blanking of the current-sense signal
1-A totem-pole output
70-ns typical response from current-sense to gate-drive output
1.5% Tolerance Voltage Reference
Same Pinout as the UCC3802 device, UC3842 device, and UC3842A device families

Specifications

Topology	Boost, Flyback	Control mode	Current
Duty cycle (max) (%)	50	Switching frequency (max) (kHz)	1000
Features	Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Soft start	UVLO thresholds on/off (V)	9.4/7.4
Operating temperature range (°C)	0 to 70	Rating	Catalog
Gate drive (typ) (A)	1	Vin (max) (V)	11
feature-type	Current Mode PWM Controller	feature-control-method	Current
feature-topology	Forward\|Flyback\|Buck\|Boost	feature-number-of-pwm-outputs	1
feature-switching-frequency-khz	1000	feature-maximum-duty-cycle-	50
feature-process-technology		feature-output-voltage-v
feature-minimum-operating-supply-voltage-v		feature-maximum-operating-supply-voltage-v	12
feature-maximum-supply-current-ma	1.2	feature-maximum-power-dissipation-mw	650
feature-synchronous-pin	No	feature-packaging	Tube
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified	No	feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-eccn-code	EAR99	feature-svhc	Yes
feature-svhc-exceeds-threshold	No