Datasheet > UC1860QTR

UC1860QTR

更新时间： 2024-11-22 23:38:51

品牌	Logo	应用领域
其他 - ETC		模拟IC
页数	文件大小	规格书
9页	616K
描述
Analog IC

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中文翻译

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数据手册

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UC1860QTR 数据手册

UC1860

UC2860

UC3860

Resonant Mode Power Supply Controller

FEATURES

DESCRIPTION

•

3MHz VFO Linear over 100:1 Range

The UC1860 family of control ICs is a versatile system for resonant mode

power supply control. This device easily implements frequency modulated

fixed-on-time control schemes as well as a number of other power supply

control schemes with its various dedicated and programmable features.

•

5MHz Error Amplifier with Controlled

Output Swing

•

Programmable One Shot Timer—

Down to 100ns

The UC1860 includes a precision voltage reference, a wide-bandwidth er-

ror amplifier, a variable frequency oscillator operable to beyond 3MHz, an

oscillator-triggered one-shot, dual high-current totem-pole output drivers,

and a programmable toggle flip-flop. The output mode is easily pro-

grammed for various sequences such as A, off, B, off; A & B, off; or A, B,

off. The error amplifier contains precision output clamps that allow pro-

gramming of minimum and maximum frequency.

•

Precision 5V Reference

Dual 2A Peak Totem Pole Outputs

Programmable Output Sequence

Programmable Under Voltage Lockout

Very Low Start Up Current

The device also contains an uncommitted comparator, a fast comparator

for fault sensing, programmable soft start circuitry, and a programmable

restart delay. Hic-up style response to faults is easily achieved. In addi-

tion, the UC1860 contains programmable under voltage lockout circuitry

that forces the output stages low and minimizes supply current during

start-up conditions.

Programmable Fault Management &

Restart Delay

•

Uncommitted Comparator

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (pin 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Comparator Output Voltage (pin 15) . . . . . . . . . . . . . . . . . . 15V

Output Current, Source or Sink (pins 17 & 20) Soft Start or Restart Delay Sink Current (pins 22 & 23) . . . 5mA

DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8A Power Dissipation at TA = 50°C (DIP) . . . . . . . . . . . . . . . 1.25W

Pulse (0.5µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0A Power Dissipation at TA = 50°C (PLCC) . . . . . . . . . . . . . . . . 1W

Power Ground Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2V Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . . 300°C

Inputs (pins 1, 2, 3, 4, 8, 9, 11, 12,

Note: All voltages are with respect to signal ground and all

currents are positive into the specified terminal.

Pin numbers refer to the DIP.

13, 14, 21, 22, 23 & 24) . . . . . . . . . . . . . . . . . . . . . . -0.4 to 6V

Error Amp Output Current, Source or Sink (pin 5). . . . . . . . 2mA

IVFO Current (pin 7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA

Comparator Output Current (pin 15) . . . . . . . . . . . . . . . . . . 5mA

Refer to Packaging Section of Databook for thermal

limitations and considerations of packages.

BLOCK DIAGRAM

10/93

12 3 4 5 6 7...9

中文翻译

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