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LM3630ATMX 数据表(PDF) 5 Page - Texas Instruments

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部件名 LM3630ATMX
功能描述  High-Efficiency Dual-String White LED Driver
Download  51 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3630ATMX 数据表(HTML) 5 Page - Texas Instruments

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LM3630A
www.ti.com
SNVS974B – APRIL 2013 – REVISED OCTOBER 2015
6.5 Electrical Characteristics
Typical limits are for TA = 25°C; minimum and maximum limits apply over the full operating ambient temperature range
(
−40°C ≤ TA ≤ 85°C); VIN = 3.6 V, unless otherwise specified.
(1)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
ILED1,
Output current regulation
2.5 V
≤ VIN ≤ 5.5 V, full-scale current = 20 mA
19
20
21
mA
ILED2
2.5 V
≤ VIN ≤ 5.5 V, ILED = 10 mA,
–1%
0.5%
1%
TA = 25°C
ILED1 to ILED2 current
ILED1 on A
IMATCH
matching (2)
ILED2 on B
2.5 V
≤ VIN ≤ 5.5 V, ILED = 10 mA,
–2.5%
0.5%
2.5%
0°C
≤ TA ≤ 70°C
Regulated current sink
VREG_CS
ILED = 5 mA
250
headroom voltage
mV
Current sink minimum
VHR
ILED = 95% of nominal, ILED = 20 mA
160
240
headroom voltage
RDSON
NMOS switch on resistance ISW = 100 mA
0.25
480
600
720
640
800
960
ICL
NMOS switch current limit
2.5 V
≤ VIN ≤ 5.5 V
mA
800
1000
1200
960
1200
1440
ON threshold, 2.3 V
≤ VIN ≤ 5.5 V
24-V option
23
24
25
Output overvoltage
VOVP
ON threshold, 2.3 V
≤ VIN ≤ 5.5 V
40-V option
39
41
44
V
protection
Hysteresis
1
560-kHz shift = 1
538
560
582
500-kHz shift = 0
481
500
518
ƒSW
Switching frequency
2.5 V
≤ VIN ≤ 5.5 V
kHz
1.12-MHz shift = 1
1077
1120
1163
1-MHz shift = 0
962
1000
1038
DMAX
Maximum duty cycle
94%
ILED1 = ILED2 =
Quiescent current into
IQ
VIN = 3.6 V
20 mA, feedback
350
µA
device, not switching
disabled.
HWEN = VIN, I
2C
1
4
shutdown
ISHDN
Shutdown current
2.3 V
≤ VIN ≤ 5.5 V
HWEN = GND
1
4
µA
Minimum LED current in
Full-scale current = 20 mA, BRT = 0x01, Exponential
ILED_MIN
13
ILED1 or ILED2
mapping mode
Thermal shutdown
140
TSD
°C
Hysteresis
15
Time period to wait from the assertion of HWEN or after
tWAIT
Initialization timing
software reset, before an I2C transaction will be ACK'ed.
1
ms
During this time period an I2C transaction will be NAK'ed
(1)
Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the
most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C.
(2)
LED current sink matching between LED1 and LED2 is given by taking the difference between ILED1 and ILED2 and dividing by the
sum of ILED1 and ILED2. The formula is (ILED1 − ILED2)/(ILED1 + ILED2) at ILED = 10 mA. ILED1 is driven by Bank A and ILED2 is driven by
Bank B.
Copyright © 2013–2015, Texas Instruments Incorporated
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Product Folder Links: LM3630A


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