PCA9632DP1-T NXP Semiconductors, PCA9632DP1-T Datasheet - Page 25

• Manufacturer Part Number: PCA9632DP1-T
• Description: LED Drivers 4-BIT FM+I2C-BUS LOW POWER LED
• Manufacturer: NXP Semiconductors

Specifications of PCA9632DP1-T

• Number Of Segments: 4
• Operating Supply Voltage (typ): 2.5/3.3/5V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TSSOP
• Pin Count: 8
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Operating Supply Voltage (min): 2.3V
• Operating Supply Voltage (max): 5.5V
• Low Level Output Current: 100000 uA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Maximum Supply Current: 150 uA
• Maximum Power Dissipation: 400 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-8
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Compliant
• Other names: PCA9632DP1,118

NXP Semiconductors
11. Limiting values
PCA9632_3
Product data sheet
Question 5: I’m using LEDs with integrated Zener diodes and the IC is getting very hot.
Why?
Table 17.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
V
V
I
I
P
T
T
O(LEDn)
SS
•
stg
amb
DD
I/O
tot
The IC outputs can be set to either open-drain or push-pull and default to push-pull
outputs. In this application with the Zener diodes, they need to be set to open-drain
since in the push-pull architecture there is a low resistance path to ground through the
Zener and this is causing the IC to overheat. The PCA9632/33/34/35 ICs all power-up
in the push-pull output mode and with the logic state HIGH, so one of the first things
that need to be done is to set the outputs to open-drain.
Limiting values
Parameter
supply voltage
voltage on an input/output pin
output current on pin LEDn
ground supply current
total power dissipation
storage temperature
ambient temperature
Rev. 03 — 15 July 2008
Conditions
operating
4-bit Fm+ I
2
C-bus low power LED driver
Min
V
-
-
-
0.5
65
40
SS
0.5
PCA9632
© NXP B.V. 2008. All rights reserved.
Max
+6.0
5.5
25
100
400
+150
+85
Unit
V
V
mA
mA
mW
25 of 38
C
C