Datasheet
TPS61160
TPS61161
www.ti.com
SLVS791C –NOVEMBER 2007–REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS
VIN = 3.6 V, CTRL = VIN, T
A
= –40°C to 85°C, typical values are at T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
V
I
Input voltage range, VIN 2.7 18 V
I
Q
Operating quiescent current into VIN Device PWM switching no load 1.8 mA
I
SD
Shutdown current CRTL=GND, VIN = 4.2 V 1 μA
UVLO Undervoltage lockout threshold VIN falling 2.2 2.5 V
V
hys
Undervoltage lockout hysterisis 70 mV
ENABLE AND REFERENCE CONTROL
V
(CTRLh)
CTRL logic high voltage VIN = 2.7 V to 18 V 1.2 V
V
(CTRLl)
CTRL logic low voltage VIN = 2.7 V to 18 V 0.4 V
R
(CTRL)
CTRL pull down resistor 400 800 1600 kΩ
t
off
CTRL pulse width to shutdown CTRL high to low 2.5 ms
t
es_det
Easy Scale detection time
(1)
CTRL pin low 260 μs
t
es_delay
EasyScale detection delay 100 μs
t
es_win
EasyScale detection window time Measured from CTRL high 1 ms
VOLTAGE AND CURRENT CONTROL
V
REF
Voltage feedback regulation voltage 196 200 204 mV
Voltage feedback regulation voltage under V
FB
= 50 mV 47 50 53
V
(REF_PWM)
mV
brightness control
V
FB
= 20 mV 17 20 23
I
FB
Voltage feedback input bias current V
FB
= 200 mV 2 μA
f
S
Oscillator frequency 500 600 700 kHz
V
FB
= 100 mV, measured on the drive
D
max
Maximum duty cycle 93% 95%
signal of the switching FET
t
min_on
Minimum on pulse width 40 ns
I
sink
Comp pin sink current 100 μA
I
source
Comp pin source current 100 μA
G
ea
Error amplifier transconductance 240 320 400 μmho
R
ea
Error amplifier output resistance 6 MΩ
f
ea
Error amplifier crossover frequency 5 pF connected to COMP 500 kHz
POWER SWITCH
VIN = 3.6 V 0.3 0.6
R
DS(on)
N-channel MOSFET on-resistance Ω
VIN = 3.0 V 0.7
I
LN_NFET
N-channel leakage current V
SW
= 35 V, T
A
= 25°C 1 μA
OC and OLP
I
LIM
N-Channel MOSFET current limit D = D
max
0.56 0.7 0.84 A
I
LIM_Start
Start up current limit D = D
max
0.4 A
t
Half_LIM
Time step for half current limit 5 ms
V
ovp
Measured on the SW pin, TPS61160 25 26 27
Open LED protection threshold V
TPS61161 37 38 39
Measured on the FB pin, percentage
V
(FB_OVP)
Open LED protection threshold on FB 50%
of Vref, Vref = 200 mV and 20 mV
t
REF
V
REF
filter time constant 180 μs
t
step
V
REF
ramp up time 213 μs
(1) To select EasyScale mode, the CTRL pin has to be low for more than t
es_det
during t
es_win
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Product Folder Link(s): TPS61160 TPS61161