Texas Instruments UC3845AJ
Manufacturer No:
UC3845AJ
Manufacturer:
Texas Instruments
Package:
Description:
Current Mode PWM Controller
Quantity:
In Stock :4959
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Expected Shipping：Fri, May 29 - Sat, May 30, 2026
Lead Time：Inquire about availability
Date Code：Within 2 Years
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UC3845AJ Information
Texas Instruments UC3845AJ technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments UC3845AJ.
- Type
- Parameter
- Rating
- Military
- Topology
- Boost, Buck, Buck boost, Flyback, Forward
- Vin (max) (V)
- 28
- Control mode
- Peak current mode
- Features
- Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology
- Operating temperature range (°C)
- 0 to 70
- Duty cycle (max) (%)
- 50
- Package
- CDIP (JG)
- Pins
- 8
- Size
- 64.032 mm² 9.6 x 6.67
- Type
- Parameter
- REACH Status
- Affected
- RoHS Status
- Non-RoHS Compliant
Download datasheets and manufacturer documentation for Texas Instruments UC3845AJ.
Data sheet:
Application note:
The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to provide latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, designed for driving N-channel MOSFETs, is low when the output stage is in the off state.
The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are good choices for off-line power supplies, while the devices with a narrower hysteresis range are designed for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.
- Optimized for off-line and DC-to-DC converters
- Low start-up current (< 1mA)
- Automatic feedforward compensation
- Pulse-by-pulse current limiting
- Enhanced load-response characteristics
- Undervoltage lockout with hysteresis
- Double-pulse suppression
- High-current totem-pole output
- Internally trimmed bandgap reference
- Up to 500kHz operation
- Error amplifier with low output resistance
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12.28 M
Listed Part Number
3,000+
Leading Manufacturers
4.9 M
In-stock SKU
15,000+
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