MAX17113 datasheet(21/30 Pages) MAXIM

tên linh kiện	MAX17113

Giải thích chi tiết về linh kiện	Low-Cost, Multiple-Output Power Supply for LCD TVs

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Low-Cost, Multiple-Output

Power Supply for LCD TVs

______________________________________________________________________________________

High-Voltage Switch Control

The MAX17113’s high-voltage switch control block

(Figure 5) consists of two high-voltage p-channel

MOSFETs: Q1, between SRC and GON and Q2, between

GON and DRN. The switch control block is enabled when

VDLP exceeds VREF. Q1 and Q2 are controlled by CTL

and MODE. There are two different modes of operation

(see the

Typical Operating Characteristics).

Select the first mode by connecting MODE to VL. When

CTL is logic-high, Q1 turns on and Q2 turns off, con-

necting GON to SRC. When CTL is logic-low, Q1 turns

off and Q2 turns on, connecting GON to DRN. GON

can then be discharged through a resistor connected

between DRN and GND or AVDD. Q2 turns off and

stops discharging GON when VGON reaches 10 times

the voltage on THR.

MODE

CTL

DLP

SRC

GON

DRN

VREF

SUI DONE

μA

REF

μA

SWITCH CONTROL

THR

VL /2

1.25k

SHDN

FAULT

MAX17113

Figure 5. Switch Control

MAX17113 bảng dữ liệu(PDF) 21 Page - Maxim Integrated Products