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TPS92690Q1PWP Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce TPS92690Q1PWP
Description  N-Channel Controller for Dimmable LED Drives
Download  41 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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TPS92690-Q1
www.ti.com
SLVSCU0 – NOVEMBER 2015
6.5 Electrical Characteristics
–40°C < TJ = TA < 125°C, VIN = 14 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
STARTUP REGULATOR (VCC)
VCCREG
VCC regulation voltage
ICC = 0 mA
6.35
6.9
7.45
V
ICCLIM
VCC current limit
VVCC = 0 V
–20
–30
mA
IQ
Quiescent current
2
3
mA
ISD
Shutdown current
VSS/SD = 0 V
45
65
μA
VVCC rising
4.1
4.50
VCCUV
VCC UVLO threshold
V
VVCC falling
3.61
4.01
VCCHYS
VCC UVLO hysteresis
83
mV
REFERENCE VOLTAGE OUTPUT
VREF
Reference voltage
No load
2.4
2.45
2.5
V
ERROR AMPLIFIER
CSP input bias current
–0.6
0
0.6
μA
COMP sink current
17.1
28.5
39.9
μA
COMP source current
VIADJ = 5 V
–12.6
–16.8
–21
μA
gM
Transconductance
VIADJ = 1 V, 0 V ≤ VCSP ≤ 0.8 V
33
μA/V
Transconductance bandwidth
–6dB
1
MHz
IADJ pin input impedance
1
M
Ω
VCSP
Error amplifier reference voltage
Precise value implied in offset
VIADJ/10
V
VVCC = 4.5 V, 1 V ≤ VCOMP ≤ 1.4 V,
–1.5
0
1.5
TA = 25°C
mV
VVCC > 6 V, 1 V ≤ VCOMP ≤ 3 V, VIADJ
Error amplifier input offset voltage
–1.8
0
1.8
≤ 1.25 V, TA = 25°C
VVCC > 6 V, 1 V ≤ VCOMP ≤3 V, VIADJ
–1.44
0
1.44
VCSP%
> 1.25 V, TA = 25°C (% of )
PWM COMPARATOR AND SLOPE COMPENSATION
DMAX
Maximum duty cycle
Internal oscillator only
90%
94.4%
No slope added
950
1100
1250
IS to PWM offset voltage
mV
D = DMAX (maximum slope added)
125
IOFF
IS source current
No slope added
–11.9
μA
IOFF + ISL
D = DMAX (maximum slope added)
–60
μA
CURRENT LIMIT
ILIM delay to output
60
100
ns
tON(min)
Leading edge blanking time
200
300
ns
Current limit off-timer
38
μs
ILIM offset voltage
D = 50%
–19
–5.6
5
mV
LOW POWER SHUTDOWN AND SOFTSTART
VSD
Shutdown threshold voltage
VSS/SD falling
30
86
mV
VSDH
Shutdown hysteresis
24
mV
VSS/SD > (VSD + VSDH)
–10.8
μA
ISS
SS/SD current source
VSS/SD < VSD
–1.1
μA
OSCILLATOR AND EXTERNAL SYNCHRONIZATION
RRT = 121 kΩ
312
350
389
ƒSW
Switching frequency
RRT = 100 kΩ
372
418
464
kHz
RRT = 84.5 kΩ
436
490
544
Rising
2.05
2.36
SYNC threshold voltage (falling edge triggers
V
on-time)
Falling
0.95
1.31
Copyright © 2015, Texas Instruments Incorporated
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