參數(shù)資料
型號(hào)： ADD8754
廠商： Analog Devices, Inc.
英文描述： LCD Panel Power, VCOM, and Gate Modulation
中文描述： 液晶面板電源，威科姆，和門(mén)調(diào)制
文件頁(yè)數(shù)： 8/28頁(yè)
文件大?。?/td> 405K
代理商： ADD8754
ADD8754
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Rev. 0 | Page 8 of 28
24
1
2
3
4
5
6
18
17
16
15
14
13
23
22
21
20
19
7
8
9
10
11
12
TOP VIEW
(Not to Scale)
ADD8754
GND
VGH_M
VFLK
VDPM
VDD_1
VDD_2
LX
VIN_2
FREQ
COMP
SS
VIN_1
0
V
R
C
P
F
O
N
P
A
A
L
S
Figure 2. Pin Configuration
Table 7. Pin Function Descriptions
Pin
Mnemonic
1
GND
2
VGH_M
3
VFLK
Description
Ground.
Gate Pulse Modulator Output. This pin supplies the gate drive signal.
Gate Pulse Modulator Control Input.
Gate Pulse Modulator Enable. VGH_M is enabled when the voltage on this pin is more than 2.2 V. VGH_M goes to
GND when this pin is connected to GND.
Gate Pulse Modulator Low Voltage Input.
V
Amplifier Supply.
COM
V
Amplifier Output.
COM
Inverting Input of V
Amplifier.
COM
Noninverting Input of V
Amplifier.
COM
Analog Ground.
LDO Output Voltage Select. Refer to Table 13 for details.
LDO Output.
Supply Input. This pin supplies power to the LDO and step-up switching regulator. Typically connected to VIN_2.
Soft Start. A capacitor must be connected between GND and this pin to set the soft start time.
Compensation for the Step-Up Converter. A capacitor and resistor are connected in series between GND and this
pin for stable operation.
Frequency Select. Set the switching frequency with a logic level. The step-up switching regulator operates at 650 kHz
when this pin is connected to GND and at 1.2 MHz when connected to VIN_1.
Step-Up Switching Regulator Power Supply. This pin supplies power to the driver for the switch. Typically
connected to VIN_1.
Step-Up Switching Regulator Switch Node.
Device Shutdown Pin. This pin allows users to shut the device off when connected to GND. The normal operating
mode is to pull this pin to VIN_1.
Feedback Voltage Sense to Set the Output Voltage of the Step-Up Switching Regulator.
Step-Up Switching Regulator Power Ground.
GPM Time Delay. A capacitor must be connected between GND and this pin to set the delay time.
GPM Negative Ramp Rate. A resistor must be connected between GND and this pin to set the negative ramp rate.
Gate Pulse Modulator High Voltage Input.
4
VDPM
5
6
7
8
9
10
11
12
13
14
VDD_1
VDD_2
OUT
NEG
POS
AGND
ADJ
LDO_OUT
VIN_1
SS
15
COMP
16
FREQ
17
VIN_2
18
LX
19
SHDN
20
21
22
23
24
FB
PGND
CE
RE
VGH
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