参数资料
型号: 5962-8768102VEA
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: 2.2 A SWITCHING CONTROLLER, 1180 kHz SWITCHING FREQ-MAX, CDIP16
封装: CERAMIC, DIP-16
文件页数: 14/15页
文件大小: 503K
代理商: 5962-8768102VEA
UDG-95106
ACTIVE LOW OUTPUTS DURING UVLO
UDG-95106
UDG-95108
SLUS873A – JANUARY 2009 – REVISED APRIL 2009 ..................................................................................................................................................... www.ti.com
Anytime ILIM exceeds 1.2 V, the fault latch is set and the output pins are driven low. The soft-start cap is then
discharged by a 250-
A current sink. No more output pulses are allowed until soft-start is fully discharged and
ILIM is below 1.2 V. At this point the fault latch resets and the chip executes a soft-start.
Should the fault latch get set during soft-start, the outputs are immediately terminated, but the soft-start capacitor
does not discharge until it has been fully charged first. This results in a controlled hiccup interval for continuous
fault conditions.
Figure 5. Soft-Start and Fault Waveforms
The UVLO function forces the outputs to be low and considers both VCC and VREF before allowing the chip to
operate.
Figure 6. Output Voltage vs Output Current
Figure 7. Output V and I During UVLO
8
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): UC1825A-SP
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