Datasheet

UCD7230
DIGITAL
CONTROLLER
AGND
3V3
ILIM
GPIO1
VCC
GND
GPIO2
GPIO3
GPIO4
2.5 kW
40 kW
ILIM SETPOINT
[Volts] GPIO3 GPIO2 GPIO1 GPIO4
ILIM (open) 0.50 OPEN OPEN OPEN OPEN
ILIM0 0.00 0 0 0 0
ILIM1 0.14 0 0 1 0
ILIM2 0.29 0 1 0 0
ILIM3 0.43 0 1 1 0
ILIM4 0.57 1 0 0 0
ILIM5 0.72 1 0 1 0
ILIM6 0.86 1 1 0 0
ILIM7 1.00 1 1 1 0
DIGITAL
CONTROLLER
PWM
Rf
Rf and Cf filter the PWM
output to generate a DC
input to the ILIM PIN
A) GPIO Outputs
B) PWM Output
UCD7230
AGND
3V3
ILIM
Cf
C) Resistor Divider
D) Internal Set Point
20 kW
10 kW
UCD7230
AGND
3V3
ILIM
GND
VCC
DIGITAL
CONTROLLER
R1
UCD7230
AGND
3V3
ILIM
GND
VCC
R2
Cf
UCD7230
www.ti.com SLUS741D –NOVEMBER 2006–REVISED JANUARY 2010
Figure 8. Setting the ILIM Voltage with: a) GPIO Outputs, b) PWM Output, c) Resistor Divider, d) Internal
Set Point
Copyright © 2006–2010, Texas Instruments Incorporated 15
Product Folder Link(s): UCD7230