Rainbow Electronics MAX8759 - Manual (Page 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.
19 PGND1 Power Ground. PGND1 is the return for the GL1 gate driver.
20 GL1 Low-Side MOSFET NL1 Gate Driver Output
21 V DD
Low-Side Gate-Driver Supply Input. Connect V DD to the output of the internal linear regulator (V CC ).
22 GL2 Low-Side MOSFET NL2 Gate-Driver Output
23 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
CC
, REF, and other analog circuitry. Connect GND to PGND under
the IC at the IC’s backside exposed metal pad.
28 V CC
5.35V/10mA Internal Linear-Regulator Output. V CC is the supply voltage for the device. Bypass V CC with a
0.47µF ceramic capacitor to GND.
— EP Exposed Backside Pad. Connect PAD to GND.
Pin Description (continued)