TPS92830-Q1 Datasheet, PDF (4/7 Pages) Texas Instruments – 3-Channel High-Current Linear LED Controller

TPS92830-Q1
SLIS184 – AUGUST 2017
PIN
NAME
NO.
ICTRL
14
IN
7
ISN1
27
ISN2
24
ISN3
21
IREF
15
ISP
28
PWM1
10
PWM2
11
PWM3
12
PWMCHG
16
PWMOUT
18
SENSE1
25
SENSE2
22
SENSE3
19
Pin Functions (continued)
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I/O
DESCRIPTION
Analog dimming input, modulates the regulation voltage across the current-sense resistor.
I
Apply a voltage source or connect a resistor between ICTRL and GND to set the analog
dimming ratio.
I
Power supply for the device. LED current only flows from the external MOSFET to the LED.
I
Channel 1 current-sense negative input. Connect a current-sense resistor between ISP and
ISN1 to set the CH 1 current.
I
Channel 2 current-sense negative input. Connect a current-sense resistor between ISP and
ISN2 to set the CH 2 current.
I
Channel 3 current-sense negative input. Connect a current-sense resistor between ISP and
ISN3 to set the CH 3 current.
O
Internal current reference. Connect an 8-kΩ resistor between IREF and GND,
I
Channel current-sense positive input. Kelvin-sense to LED sense-resistor positive node.
I
Channel 1 PWM input
I
Channel 2 PWM input
I
Channel 3 PWM input
I/O
On-chip PWM generator pin for external R-C. Connect a resistor and a capacitor between
PWMCHG and GND to set the PWM duty cycle and frequency.
O
High-voltage PWM open-drain output,. Connect a 10-kΩ resistor between IN and PWMOUT
I/O
Channel 1 diagnostics pin. Connect to the CH 1 MOSFET source terminal
I/O
Channel 2 diagnostics pin. Connect to the CH 2 MOSFET source terminal
I/O
Channel 3 diagnostics pin. Connect to the CH 3 MOSFET source terminal
4
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