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TPS61196-Q1 Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza TPS61196-Q1
Descripción Electrónicos  TPS61196-Q1 6-String 400-mA WLED Driver with Independent PWM Dimming For Each String
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61196-Q1 Datasheet(HTML) 6 Page - Texas Instruments

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TPS61196-Q1
SNVSA79 – MARCH 2015
www.ti.com
Electrical Characteristics (continued)
VIN= 24 V, C1 = 10 μF, C2 = 2.2 μF, C3 = 1 μF, EC1 = EC2 = 100 μF; Typical values are at TA = 25°C, Minimum and
Maximum limits are over the operating temperature range (TA = –40°C to 125°C) (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IFB REGULATION VOLTAGE
Measured on VIFB(min), other IFB
voltages are 0.5 V above VIFB(min).
VIFB
Regulation voltage at IFB
508
mV
IIFB = 130 mA, VIFBV = 0.5 V
IFB Regulation voltage setting
IIFBV
VIFBV = 0.5 V
0.247
0.25
0.253
IISET
sourcing current at IFBV
VIFBV
IFBV voltage setting range
0.3
1
V
BOOST REFERENCE VOLTAGE
Reference voltage range for Boost
VREF
0
3.1
V
Controller
IREF_LEAK
Leakage current at REF pin
–25
25
nA
OSCILLATOR
fSW
Switching frequency
RFSW = 200 kΩ
187
200
213
kHz
VFSW
FSW pin reference voltage
1.8
V
Dmax
Maximum duty cycle
fSW = 200 kHz
90%
94%
98%
ton(min)
Minimum pulse width
200
ns
VFSW_H
Logic high input voltage
3.5
V
VFSW_L
Logic low input voltage
0.5
V
ERROR AMPLIFIER
ISINK
Comp pin sink current
VOVP = VREF + 200 mV, VCOMP = 1 V
20
µA
ISOURCE
Comp pin source current
VOVP = VREF – 200 mV, VCOMP = 1 V
20
µA
GmEA
Error amplifier transconductance
90
120
150
µs
REA
Error amplifier output resistance
20
M
fEA
Error amplifier crossover frequency
1000
kHz
GATE DRIVER
Gate driver impedance when
RGDRV(SRC)
VDD = 6 V, IGDRV = –20 mA
2
3
sourcing
Gate driver impedance when
RGDRV(SNK)
VDD = 6 V, IGDRV = 20 mA
1
1.5
sinking
IGDRV(SRC)
Gate driver source current
VGDRV = 5 V
200
mA
IGDRV(SNK)
Gate driver sink current
VGDRV = 1 V
400
mA
VISNS(OC)
Overcurrent detection threshold
VIN = 8 V to 30 V, TJ = 25°C to 125°C
376
400
424
mV
OVERVOLTAGE PROTECTION (OVP)
VOVPTH
Output voltage OVP threshold
2.95
3.02
3.09
V
IOVP
Leakage current
–100
0
100
nA
VIFB_OVP
IFBx over voltage threshold
PWM ON
38
V
LED SHORT DETECTION
LED short detection sourcing
IFBP
VFBP = 1 V
0.247
0.25
0.253
IISET
current
FAULT INDICATOR
IFAULT_H
Leakage current in high impedance
VFAULT = 24 V
1
nA
IFAULT_L
Sink current at low output
VFAULT = 1 V
1
2
mA
THERMAL SHUTDOWN
Tshutdown
Thermal shutdown threshold
150
°C
Thermal shutdown threshold
Thys
15
°C
hysteresis
6
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