UC3845BD1013TR
Switching Controllers 0.5mA Current Mode
Quantity | Unit Price(USD) | Ext. Price |
---|---|---|
5 | $0.271 | $1.36 |
50 | $0.217 | $10.85 |
150 | $0.193 | $28.95 |
500 | $0.164 | $82.00 |
2500 | $0.151 | $377.50 |
5000 | $0.144 | $720.00 |
Inventory:6,867
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Part Number : UC3845BD1013TR
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Package/Case : SOIC-8
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Brands : Stmicroelectronics
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Components Categories : DC DC Switching Controllers
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Datesheet : UC3845BD1013TR DataSheet (PDF)
Overview of UC3845BD1013TR
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.
Key Features
- LOW START-UP AND OPERATING CURRENT
- UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
- INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
- CURRENT LIMITING
- TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
- CURRENT MODE OPERATION TO 500kHz
- OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
- LATCHING PWM FOR CYCLE-BY-CYCLE
- HIGH CURRENT TOTEM POLE OUTPUT
- AUTOMATIC FEED FORWARD COMPENSATION
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
ECCN US | EAR99 | ECCN EU | NEC |
Packing Type | Tape And Reel | RoHs compliant | Ecopack2 |
Grade | Industrial | Package Name | SO-8 |
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