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PCA9922PW Datasheet(PDF) 5 Page - NXP Semiconductors

Part # PCA9922PW
Description  8-channel constant current LED driver with output error detection
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9922PW Datasheet(HTML) 5 Page - NXP Semiconductors

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PCA9922_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 15 January 2009
5 of 26
NXP Semiconductors
PCA9922
8-channel constant current LED driver with output error detection
6.2 Pin description
[1]
HVQFN20 package die supply ground is connected to both VSS pin and exposed center pad. VSS pin must
be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board
level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad
on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the
PCB in the thermal pad region.
Table 3.
Pin description
I = input; O = output.
Symbol
Pin
Type
Description
DIP16,
TSSOP16
HVQFN20
VSS
119[1]
power supply
supply ground
SDI
2
20
I
serial data in
CLK
3
1
I
serial data clock used to shift data on SDI
into the shift register
LE/DM1
4
2
I
latch enable with internal pull-down
resistor; active HIGH signal used to
capture data in the shift register to present
to the outputs
Detection Mode 1
LED0
5
3
O
constant current LED output driver 0
LED1
6
4
O
constant current LED output driver 1
LED2
7
5
O
constant current LED output driver 2
LED3
8
6
O
constant current LED output driver 3
LED4
9
10
O
constant current LED output driver 4
LED5
10
11
O
constant current LED output driver 5
LED6
11
12
O
constant current LED output driver 6
LED7
12
13
O
constant current LED output driver 7
OE/DM2
13
14
I
output enable with internal pull-up resistor;
active LOW signal used to allow data
captured in the latch to be presented to
the constant current outputs
Detection Mode 2
SDO
14
15
O
serial data output
R_EXT
15
16
analog input
external resistor input
VDD
16
17
power supply
supply voltage
n.c.
-
7, 8, 9, 18
-
not connected


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