Description
UC2845BD1013TR STMicroelectronics Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 8-SO
Specifications
Manufacturer: STMicroelectronics
Product Category: Switching Controllers
RoHS: Details
Topology: Boost, Flyback
Number of Outputs: 1 Output
Switching Frequency: 500 kHz
Duty Cycle – Max: 50 %
Output Voltage: 4.95 V to 5.05 V
Output Current: 1000 mA
Minimum Operating Temperature: – 40 C
Maximum Operating Temperature: + 150 C
Mounting Style: SMD/SMT
Package / Case: SO-8
Series: UC2845B
Type: Current Mode PWM Controllers
Brand: STMicroelectronics
Fall Time: 50 ns
Operating Supply Current: 12 mA
Operating Supply Voltage: 30 V
Product Type: Switching Controllers
Rise Time: 50 ns
Factory Pack Quantity: 2000
Subcategory: PMIC – Power Management ICs
Unit Weight: 0.017870 oz
The UC284xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state. Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
Manufacturer:STMicroelectronics
Datasheet:STMicro/SGSTS36761-1.pdf
