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TPS61160 Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza TPS61160
Descripción Electrónicos  White LED Driver With Digital and PWM Brightness Control in 2mm x 2mm QFN Package
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61160 Datasheet(HTML) 3 Page - Texas Instruments

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TPS61160
TPS61161
www.ti.com
SLVS791C – NOVEMBER 2007 – REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS
VIN = 3.6 V, CTRL = VIN, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
VI
Input voltage range, VIN
2.7
18
V
IQ
Operating quiescent current into VIN
Device PWM switching no load
1.8
mA
ISD
Shutdown current
CRTL=GND, VIN = 4.2 V
1
μA
UVLO
Undervoltage lockout threshold
VIN falling
2.2
2.5
V
Vhys
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
k
toff
CTRL pulse width to shutdown
CTRL high to low
2.5
ms
tes_det
Easy Scale detection time(1)
CTRL pin low
260
μs
tes_delay
EasyScale detection delay
100
μs
tes_win
EasyScale detection window time
Measured from CTRL high
1
ms
VOLTAGE AND CURRENT CONTROL
VREF
Voltage feedback regulation voltage
196
200
204
mV
Voltage feedback regulation voltage under
VFB = 50 mV
47
50
53
V(REF_PWM)
mV
brightness control
VFB = 20 mV
17
20
23
IFB
Voltage feedback input bias current
VFB = 200 mV
2
μA
fS
Oscillator frequency
500
600
700
kHz
VFB = 100 mV, measured on the drive
Dmax
Maximum duty cycle
93%
95%
signal of the switching FET
tmin_on
Minimum on pulse width
40
ns
Isink
Comp pin sink current
100
μA
Isource
Comp pin source current
100
μA
Gea
Error amplifier transconductance
240
320
400
μmho
Rea
Error amplifier output resistance
6
M
fea
Error amplifier crossover frequency
5 pF connected to COMP
500
kHz
POWER SWITCH
VIN = 3.6 V
0.3
0.6
RDS(on)
N-channel MOSFET on-resistance
VIN = 3.0 V
0.7
ILN_NFET
N-channel leakage current
VSW = 35 V, TA = 25°C
1
μA
OC and OLP
ILIM
N-Channel MOSFET current limit
D = Dmax
0.56
0.7
0.84
A
ILIM_Start
Start up current limit
D = Dmax
0.4
A
tHalf_LIM
Time step for half current limit
5
ms
Vovp
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
tREF
VREF filter time constant
180
μs
tstep
VREF ramp up time
213
μs
(1)
To select EasyScale mode, the CTRL pin has to be low for more than tes_det during tes_win
Copyright © 2007–2012, Texas Instruments Incorporated
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Product Folder Link(s): TPS61160 TPS61161


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