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LM3633YFQR Fiches technique(PDF) 5 Page - Texas Instruments

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No de pièce LM3633YFQR
Description  Complete Lighting Power Solution for Smartphone Handsets
Download  59 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3633YFQR Fiches technique(HTML) 5 Page - Texas Instruments

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LM3633
www.ti.com
SNVS867 – JUNE 2014
6.5 Electrical Characteristics
Limits apply over the full operating ambient temperature range (
−40°C ≤ TA ≤ 85°C) and VIN = 3.6 V, unless otherwise
specified.
(1) (2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (IN PIN)
ISHDN
Shutdown current
2.7 V
≤ VIN ≤ 5.5 V, HWEN = GND
1
5.5
µA
THERMAL SHUTDOWN
Thermal shutdown
140
TSD
°C
Hysteresis
15
BOOST CONVERTER AND HVLED
Full-scale current = 20.2
mA, PWM off, brightness
code = max, exponential
18.38
22.02
2.7 V
≤ VIN ≤ 5.5 V
20.2
mA
mapping, auto headroom
(–9%)
(9%)
off, HVLED1 Bank A,
Output current regulation
HVLED2/3 Bank B
IHVLED(1/2/3)
(HVLED1, HVLED2 or
Full-scale current = 20.2
TA = 25°C
–3.4%
±2.0%
3.2%
HVLED3)
mA, PWM off, brightness
TA = 25°C,
–3.6%
3.4%
code = max, exponential
3.0 V
≤ VIN ≤ 4.5 V
mapping, auto headroom
off, HVLED1 Bank A,
TA = 25°C
±2.0%
HVLED2/3 Bank B
2.7 V
≤ VIN ≤ 5.5 V,
–2.5%
2.5%
ILED = 20.2 mA
PWM off, exponential
HVLED1 to HVLED2 or
mapping, auto headroom
TA = 25°C,
IMATCH_HV
–2.0%
1.7%
HVLED3 matching (3)
off
ILED = 20.2 mA
HVLED1,2,3 = Bank A,
2.7 V
≤ VIN ≤ 5.5 V
–8.5%
8.5%
ILED = 500 µA
ILED_MIN
Minimum LED current
Full-scale current = 20.2 mA, Exponential Mapping
6.0
µA
Regulated current sink
VREG_CS
Auto headroom off, TA = 25°C
400
headroom voltage
mV
Minimum current sink
ILED = 95% of nominal, full-
2.7 V
≤ VIN ≤ 5.5 V
285
VHR_HV
headroom voltage for
scale current = 20.2 mA,
TA = 25°C
190
HVLED current sinks
auto headroom off
NMOS switch on
RDSON
ISW = 500 mA, TA = 25°C
0.3
resistance
880
1120
ICL_BOOST
NMOS switch current limit
mA
TA = 25°C
1000
2.7 V
≤ VIN ≤ 5.5 V
38.75
41.1
ON threshold
Output overvoltage
OVP select bits = 11
VOVP
TA = 25°C
40
V
protection
Hysteresis
TA = 25°C
1
Boost frequency select bit = 2.7 V
≤ VIN ≤ 5.5 V
450
550
0
TA = 25°C
500
fSW
Switching frequency
kHz
Boost frequency select bit = 2.7 V
≤ VIN ≤ 5.5 V
900
1100
1
TA = 25°C
1000
DMAX
Maximum duty cycle
2.7 V
≤ VIN ≤ 5.5 V
94%
CHARGE PUMP AND LVLED
Full-scale current = 20.2
Output current regulation
ILVLED(1/2/3/4/5/6)
mA, brightness code =
2.7 V
≤ VIN ≤ 5.5 V
18.38
20.2
22.02
mA
(low-voltage current sinks)
0xFF
(1)
All voltages are with respect to the potential at the GND pin.
(2)
Minimum and Maximum limits are verified by design, test, or statistical analysis. Typical (Typ) numbers are not verified, but do represent
the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C.
(3)
LED current sink matching in the high-voltage current sinks (HVLED1 through HVLED3) is given as the maximum matching value
between any two current sinks, where the matching between any two high voltage current sinks (X and Y) is given as (IHVLEDX ( or
IHVLEDY) - IAVE(X-Y))/(IAVE(X-Y)) x 100. In this test all three HVLED current sinks are assigned to Bank A.
Copyright © 2014, Texas Instruments Incorporated
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