add8754dacpz-reel7 Analog Devices, Inc., add8754dacpz-reel7 Datasheet - Page 8

• Manufacturer Part Number: add8754dacpz-reel7
• Description: Lcd Panel Power, Vcom, And Gate Modulation
• Manufacturer: Analog Devices, Inc.

ADD8754
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 7. Pin Function Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Mnemonic
GND
VGH_M
VFLK
VDPM
VDD_1
VDD_2
OUT
NEG
POS
AGND
ADJ
LDO_OUT
VIN_1
SS
COMP
FREQ
VIN_2
LX
SHDN
FB
PGND
CE
RE
VGH
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
V
Inverting Input of V
Noninverting Input of V
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.
COM
COM
Amplifier Supply.
Amplifier Output.
COM
Amplifier.
COM
VGH_M
VDD_1
VDD_2
VDPM
VFLK
GND
Amplifier.
1
2
3
4
5
6
Figure 2. Pin Configuration
24
7
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23
8
(Not to Scale)
ADD8754
TOP VIEW
22
9
21
10
20
11
19
12
18
17
16
15
14
13
LX
VIN_2
FREQ
COMP
SS
VIN_1