Datasheet
TPS65708
www.ti.com
SLVSAE1A –OCTOBER 2010– REVISED FEBRUARY 2011
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted: VIN1 = VIN2 = VCC = 5V, L = 1.5µH, C
OUTDCDCx
= 10µF, C
OUTLDOx
= 2.2µF, T
A
= –40°C to 85°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
LED CURRENT SINK
Set internally by EEPROM to 7.5mA; available
Isink Current (LED current for 100% duty
I
LED
current range from 7.5mA to 30mA; contact 7.5 mA
cycle)
factory about default settings other than 7.5mA
Minimum voltage drop from ISINK to
at 7.5mA ≤ ISINK ≤ 20mA 0.4 V
AGND needed for proper regulation
Minimum voltage drop from ISINK to
at 20mA < ISINK ≤ 30mA 0.55 V
AGND needed for proper regulation
ISINK accuracy ISINK ≥ 10mA –5% 5%
ISINK accuracy 7.5mA ≤ ISINK < 10mA –10% 10%
PWM duty cycle 5% 100%
PWM frequency 50 kHz
V
IH
High Level Input Voltage for PWM pin ISINK is enabled 1.2 V
CC
V
V
IL
Low Level Input Voltage for PWM pin ISINK is high resistive 0 0.4 V
I
lkg
Input Leakage Current on PWM pin 0.01 0.1 μA
V
(ISINK)
≥ 0.4V for 7.5 mA ≤ ISINK ≤ 20mA; or
ISINK rise / fall time 500 ns
V
(ISINK)
> 0.6V for 20mA < ISINK ≤ 30mA
ISINK rise / fall time V
(ISINK)
≤ 0.6V; 20mA < ISINK ≤ 30 mA 700 ns
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