UC3825BDW

Active

Texas Instruments

30V, 2A DOUBLE ENDED 1MHZ PWM CONTROLLER WITH 16V/10V UVLO AND 50% DUTY CYCLE, 0C TO 70C

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsDatasheet High-Speed PWM Controller datasheet (Rev. F)

UC3825BDW

Active

Texas Instruments

30V, 2A DOUBLE ENDED 1MHZ PWM CONTROLLER WITH 16V/10V UVLO AND 50% DUTY CYCLE, 0C TO 70C

Deep-Dive with AI

DocumentsDatasheet High-Speed PWM Controller datasheet (Rev. F)

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC3825BDW

Control Features	Soft Start, Frequency Control
Duty Cycle	50 %
Fault Protection	Current Limiting
Frequency - Switching	1 MHz
Internal Switch(s)	False
Mounting Type	Surface Mount
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-55 °C
Output Isolation	Non-Isolated
Package / Case	16-SOIC
Package / Case [x]	0.295 in
Package / Case [y]	7.5 mm
Supplier Device Package	16-SOIC
Topology	Flyback, Boost, Forward, Buck
Voltage - Start Up	16 V
Voltage - Supply (Vcc/Vdd) [Max]	22 V
Voltage - Supply (Vcc/Vdd) [Min]	10 V

UC3825A Series

Ehanced 30V, 1.5A double ended PWM controller with 9.2V/8.4V UVLO and 85% duty cycle , 0C to 70C

Part	Output Phases	Frequency - Switching [Min]	Frequency - Switching [Max]	Control Features	Mounting Type	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Supplier Device Package	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Configuration	Topology	Function	Package / Case [x]	Package / Case	Package / Case [y]	Package / Case	Package / Case	Duty Cycle (Max) [Max]	Output Isolation	Voltage - Start Up	Frequency - Switching	Duty Cycle	Fault Protection
Texas Instruments UC3825DW	1	340 kHz	460 kHz	Current Limit Enable Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	30 V	Positive	Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Down Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm
Texas Instruments UC3825ANG4	1	400 kHz	1 MHz	Current Limit Frequency Control Ramp Soft Start	Through Hole	Transistor Driver	70 °C	0 °C	2	16-PDIP	8.4 V	22 V	Positive	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Up Step-Up/Step-Down		16-DIP		0.3 in	7.62 mm	50 %
Texas Instruments UC3825ADWG4	1	400 kHz	1 MHz	Current Limit Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	22 V	Positive	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm			50 %
Texas Instruments UC3825QTRG3	1	340 kHz	460 kHz	Current Limit Enable Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	20-PLCC (9x9)	8.4 V	30 V	Positive	Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Down Step-Up Step-Up/Step-Down		20-LCC (J-Lead)
Texas Instruments UC3825BDW				Frequency Control Soft Start	Surface Mount		150 °C	-55 °C		16-SOIC	10 V	22 V		Boost Buck Flyback Forward		0.295 in	16-SOIC	7.5 mm				Non-Isolated	16 V	1 MHz	50 %	Current Limiting
Texas Instruments UC3825DWTR	1	340 kHz	460 kHz	Current Limit Enable Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	30 V	Positive	Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Down Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm
Texas Instruments UC3825ADWTRG4	1	400 kHz	1 MHz	Current Limit Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	22 V	Positive	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm			50 %
Texas Instruments UC3825DWG4	1	340 kHz	460 kHz	Current Limit Enable Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	30 V	Positive	Boost Buck Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Down Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm
Texas Instruments UC3825ADWTR	1	400 kHz	1 MHz	Current Limit Frequency Control Ramp Soft Start	Surface Mount	Transistor Driver	70 °C	0 °C	2	16-SOIC	8.4 V	22 V	Positive	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull	Step-Up Step-Up/Step-Down	0.295 in	16-SOIC	7.5 mm			50 %
Texas Instruments UC3825BDWTR				Frequency Control Soft Start	Surface Mount		150 °C	-55 °C		16-SOIC	10 V	22 V		Boost Buck Flyback Forward		0.295 in	16-SOIC	7.5 mm				Non-Isolated	16 V	1 MHz	50 %	Current Limiting

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 13.03
		10	$ 11.98
		40	$ 11.48
		120	$ 10.12
		280	$ 9.62
		520	$ 9.00
		1000	$ 8.25
Texas Instruments	TUBE	1	$ 10.20
		100	$ 8.91
		250	$ 6.87
		1000	$ 6.14

Description

General part information

UC3825A Series

The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

These devices feature totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on state is designed as a high level.