PCU9955TW,118 NXP Semiconductors, PCU9955TW,118 Datasheet - Page 25

• Manufacturer Part Number: PCU9955TW,118
• Description: LED Lighting Drivers 16-ch Ufm I2C-bus 57 mA LED driver
• Manufacturer: NXP Semiconductors

Specifications of PCU9955TW,118

• Rohs: yes
• Input Voltage: 3 V to 5.5 V
• Maximum Supply Current: 15 mA
• Mounting Style: SMD/SMT
• Package / Case: HTSSOP-28
• Power Dissipation: 3.2 W
• Factory Pack Quantity: 2500

NXP Semiconductors
PCU9955
Product data sheet
Fig 16. LED All Call I
sequence (A)
sequence (B)
(1) In this example, several PCU9955s are used and the same sequence (A) (above) is sent to each of them.
(2) ALLCALL bit in MODE1 register is previously set to 1 for this example.
(3) OCH bit in MODE2 register is previously set to 1 for this example.
(cont.)
S
S
START condition
START condition
LEDOUT1 register (LED fully ON)
1
1
0
LED All Call I
1
0
1
slave address
2
C-bus address programming and LED All Call sequence example
0 A3 A2 A1 A0 0
1
0
0
1
2
C address
1
0
the 16 LEDs are on
always set to 1
(1)
always set to 1
always set to 1
0
1
at the 9th bit
1
0
this bit is
this bit is
this bit is
All information provided in this document is subject to legal disclaimers.
W
W
0
1
1
1
1
(3)
LEDOUT2 register (LED fully ON)
1
Auto-Increment on
1
0
Rev. 2 — 2 October 2012
0
0
1
16-channel UFm I
register selection
1
0
0
register selection
ALLCALLADR
control register
control register
LEDOUT0
1
0
1
1
0
0
the 16 LEDs are on
always set to 1
1
0
1
at the 9th bit
1
1
0
this bit is
0
0
1
2
1
this bit is
always set to 1
1
this bit is
always set to 1
1
C-bus 57 mA constant current LED driver
(3)
LEDOUT0 register (LED fully ON)
LEDOUT3 register (LED fully ON)
new LED All Call I
1
0
0
the 16 LEDs are on at the 9th bit
0
1
1
1
0
0
0
1
1
1
0
0
2
the 16 LEDs are on
C address
always set to 1
always set to 1
always set to 1
0
1
1
at the 9th bit
STOP condition
1
0
0
this bit is
this bit is
this bit is
(2)
X
1
1
PCU9955
© NXP B.V. 2012. All rights reserved.
1
1
1
(3)
(3)
(cont.)
P
P
STOP condition
002aaf105
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