MAX8722EEG Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX8722EEG Datasheet PDF : 20 Pages
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Low-Cost CCFL Backlight Controller
Pin Description (continued)
PIN
NAME
FUNCTION
18
GH1 High-Side MOSFET NH1 Gate-Driver Output
19
GL1 Low-Side MOSFET NL1 Gate-Driver Output
20
GL2 Low-Side MOSFET NL2 Gate-Driver Output
21
PGND Power Ground. PGND is the return for the GL1 and GL2 gate drivers.
22
VDD
Low-Side Gate-Driver Supply Input. Connect VDD to the output of the internal linear regulator (VCC). Bypass
VDD with a 0.1µF capacitor to PGND.
23
VCC
5.3V/10mA Internal Linear-Regulator Output. VCC is the supply voltage for the device. Bypass VCC with a
1µF ceramic capacitor to GND.
24
GND
Analog Ground. The ground return for VCC, REF, and other analog circuitry. Connect GND to PGND under
the IC at the IC’s backside exposed metal pad.
VIN
GND
VCC
F1
2A
C8
0.1µF
C9
0.47µF
R4
100kΩ
R5
200kΩ
ON/OFF
BRIGHTNESS
SYNC
DPWM
R6
169kΩ
1%
VDD
BATT
GND MAX8722
VCC
BST2
BST1
GH1
ILIM
LX1
LX2
FREQ
GL1
SHDN
CNTL
SYNC
DPWM
PGND
GL2
GH2
VFB
ISEC
IFB
COMP
TFLT
VCC
C7
0.47µF
D1
C1
4.7µF
25V
C6
0.1µF
C5
0.1µF
NH1 NH2
C2
1µF
T1
NL1 NL2
C11
0.22µF
C10
0.01µF
R3
40.2Ω
1%
CCFL
C3
18pF
3kV
C4
15nF
R1
150Ω
1%
Figure 1. Typical Operating Circuit of the MAX8722
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