Rainbow-electronics MAX8759 Bedienungsanleitung PDF herunterladen (Seite 11)

MAX8759

Low-Cost, SMBus, CCFL Backlight Controller

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PIN NAME FUNCTION

18 BST1 GH1 Gate-Driver Supply Input. Connect a 0.1µF capacitor from LX1 to BST1.

PGND1

Power Ground. PGND1 is the return for the GL1 gate driver.

20 GL1 Low-Side MOSFET NL1 Gate Driver Output

21 V

Low-Side Gate-Driver Supply Input. Connect V

to the output of the internal linear regulator (V

22 GL2 Low-Side MOSFET NL2 Gate-Driver Output

PGND2

Power Ground. PGND2 is the return for the GL2 gate driver.

24 BST2 GH2 Gate-Driver Supply Input. Connect a 0.1µF capacitor from LX2 to BST2.

25 GH2 High-Side MOSFET NH2 Gate-Driver Output

26 LX2

GH2 Gate-Driver Return. LX2 is the input to the current-limit and zero-crossing comparators. The device

senses the voltage across the low-side MOSFET NL2 to detect primary current zero crossing and primary

overcurrent.

27 GND

Analog Ground. The ground return for V

, REF, and other analog circuitry. Connect GND to PGND under

the IC at the IC’s backside exposed metal pad.

28 V

5.35V/10mA Internal Linear-Regulator Output. V

is the supply voltage for the device. Bypass V

with a

0.47µF ceramic capacitor to GND.

—EPExposed Backside Pad. Connect PAD to GND.

Pin Description (continued)

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 30 31

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Rainbow-electronics MAX8759 Bedienungsanleitung Seite 11