Pin Specifications

Pin Description
PIN	NAME	FUNCTION
1	V_PROG	Programming Voltage. Apply a voltage of 8.5V to this pin during the programming of non-volatile registers. Connect to GND through a resistor during normal operation.
2	LXN	DC-DC Inverting Converter Inductor/Diode Connection.
3	INN	Inverting Converter Input. Connect 10μF + 0.1μF ceramic capacitors from this pin to ground for proper operation.
4	VCB	Drive Output for External npn Pass Transistor for VCOMN regulator. Connect to the base of the external npn transistor.
5	VCOM	Output of VCOM amplifier.
6	VCOMN	Negative Supply for VCOM Buffer. Connect a ceramic capacitor of at least 1μF from VCOMN to GND.
7	IN	Supply Connection for Display Bias Circuitry. Bypass IN with local 10μF and 0.1μF capacitors.
8	EN	Enable Input Pin. When EN is low, the device is in shutdown. When EN is taken high, the device is active. In stand-alone mode, the outputs are turned on in the stored sequence when EN goes high.
9	ADD	Device Address Select pin. Connect to GND or V18 to Select the Device I²C Address. See the I²C address table. To use stand-alone mode (without I²C) leave the ADD pin open. In this mode, the device turns on all outputs in the programmed sequence when EN is taken high.
10	V18	Output of Internal 1.8V Regulator. Connect a 1μF capacitor from V18 to GND.
11	GND	Ground Connection
12	BST	Bootstrap Capacitor Connection for Synchronous Rectifier Driver. Connect a 0.1μF ceramic capacitor between BST and LXP.
13	PGND	Ground Connection for Boost Switching Device and VCOM Buffer. Connect to GND using a low-impedance trace.
14	LXP	Switching Node of Boost Converter. Connect the boost inductor between LXP and IN.
15	HVINP	Boost Output and Input to Positive and Negative Charge-Pump Drivers. Bypass HVINP with a 10μF output capacitor placed close to the pin.
16	AVDD	Switched Output of Boost Converter. Connect a bypass capacitor of value 2.2μF from AVDD to PGND.
17	PGVDD	Supply Voltage for Positive Charge Pump. PGVDD is connected to HVINP by means of an internal switch when the positive charge pump is enabled. Bypass PGVDD with a ceramic capacitor of 1μF to GND.
18	FC2+	Positive Connection for Second Flying Capacitor. Connect a 22nF capacitor from FC2- to FC2+.
19	FC2-	Negative Connection for Second Flying Capacitor. Connect a 22nF capacitor from FC2- to FC2+.
20	FC1+	Positive Connection for First Flying Capacitor. Connect a 22nF capacitor from FC1- to FC1+.
21	FC1-	Negative Connection for First Flying Capacitor. Connect a 22nF capacitor from FC1- to FC1+.
22	VG_ON	Output of Positive Charge-Pump Block. Connect a 1μF capacitor from VG_ON to GND.
23	CPGND	Ground Connection for Charge Pumps.
24	VG_OFF	Output of Negative Charge-Pump Block. Connect a 1μF capacitor from this pin to GND.
25	DN	Negative Charge-Pump Push-Pull Drive Output.
26	SDA	Bidirectional I²C Data Pin.
27	SCL	I²C Clock Pin.
28	FLTB	Open-Drain, Active-Low Fault Output. Connect a pullup resistor from FLTB to a logic supply ≤5V. In stand-alone mode, the duty cycle of the FLTB pin indicates an error condition, if present (see Table 4). When the serial interface is used, FLTB is either a 0 (indicating data to be read from the internal registers) or a 1.
29	R_REF	Reference Resistor Pin. When using the temperature compensation function, connect a resistor from R_REF to GND. If unused, leave R_REF unconnected.
30	TEMP	Temperature Sensor Pin. When using the temperature compensation function, connect an NTC from TEMP to GND. If unused, leave TEMP unconnected.
31	DGND	Logic Ground.
32	NAVDD	Negative Source-Driver Output Voltage. Connect ceramic capacitors of value 0.1μF and 10μF from this pin to GND with the smallest capacitor closest to the pin.

1

V_PROG

Programming Voltage. Apply a voltage of 8.5V to this pin during the programming of non-volatile registers. Connect to GND through a resistor during normal operation.

2

LXN

DC-DC Inverting Converter Inductor/Diode Connection.

3

INN

Inverting Converter Input. Connect 10μF + 0.1μF ceramic capacitors from this pin to ground for proper operation.

4

VCB

Drive Output for External npn Pass Transistor for VCOMN regulator. Connect to the base of the external npn transistor.

5

VCOM

Output of VCOM amplifier.

6

VCOMN

Negative Supply for VCOM Buffer. Connect a ceramic capacitor of at least 1μF from VCOMN to GND.

7

IN

Supply Connection for Display Bias Circuitry. Bypass IN with local 10μF and 0.1μF capacitors.

8

EN

Enable Input Pin. When EN is low, the device is in shutdown. When EN is taken high, the device is active. In stand-alone mode, the outputs are turned on in the stored sequence when EN goes high.

9

ADD

Device Address Select pin. Connect to GND or V18 to Select the Device I²C Address. See the I²C address table. To use stand-alone mode (without I²C) leave the ADD pin open. In this mode, the device turns on all outputs in the programmed sequence when EN is taken high.

10

V18

Output of Internal 1.8V Regulator. Connect a 1μF capacitor from V18 to GND.

11

GND

Ground Connection

12

BST

Bootstrap Capacitor Connection for Synchronous Rectifier Driver. Connect a 0.1μF ceramic capacitor between BST and LXP.

13

PGND

Ground Connection for Boost Switching Device and VCOM Buffer. Connect to GND using a low-impedance trace.

14

LXP

Switching Node of Boost Converter. Connect the boost inductor between LXP and IN.

15

HVINP

Boost Output and Input to Positive and Negative Charge-Pump Drivers. Bypass HVINP with a 10μF output capacitor placed close to the pin.

16

AVDD

Switched Output of Boost Converter. Connect a bypass capacitor of value 2.2μF from AVDD to PGND.

17

PGVDD

Supply Voltage for Positive Charge Pump. PGVDD is connected to HVINP by means of an internal switch when the positive charge pump is enabled. Bypass PGVDD with a ceramic capacitor of 1μF to GND.

18

FC2+

Positive Connection for Second Flying Capacitor. Connect a 22nF capacitor from FC2- to FC2+.

19

FC2-

Negative Connection for Second Flying Capacitor. Connect a 22nF capacitor from FC2- to FC2+.

20

FC1+

Positive Connection for First Flying Capacitor. Connect a 22nF capacitor from FC1- to FC1+.

21

FC1-

Negative Connection for First Flying Capacitor. Connect a 22nF capacitor from FC1- to FC1+.

22

VG_ON

Output of Positive Charge-Pump Block. Connect a 1μF capacitor from VG_ON to GND.

23

CPGND

Ground Connection for Charge Pumps.

24

VG_OFF

Output of Negative Charge-Pump Block. Connect a 1μF capacitor from this pin to GND.

25

DN

Negative Charge-Pump Push-Pull Drive Output.

26

SDA

Bidirectional I²C Data Pin.

27

SCL

I²C Clock Pin.

28

FLTB

Open-Drain, Active-Low Fault Output. Connect a pullup resistor from FLTB to a logic supply ≤5V. In stand-alone mode, the duty cycle of the FLTB pin indicates an error condition, if present (see Table 4). When the serial interface is used, FLTB is either a 0 (indicating data to be read from the internal registers) or a 1.

29

R_REF

Reference Resistor Pin. When using the temperature compensation function, connect a resistor from R_REF to GND. If unused, leave R_REF unconnected.

30

TEMP

Temperature Sensor Pin. When using the temperature compensation function, connect an NTC from TEMP to GND. If unused, leave TEMP unconnected.

31

DGND

Logic Ground.

32

NAVDD

Negative Source-Driver Output Voltage. Connect ceramic capacitors of value 0.1μF and 10μF from this pin to GND with the smallest capacitor closest to the pin.