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TPS92551EVM Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce TPS92551EVM
Description  450mA 23W Constant Current Buck LED Driver Micro-Module
Download  26 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS92551EVM Fiches technique(HTML) 5 Page - Texas Instruments

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TPS92551, TPS92551EVM
www.ti.com
SNVS805C – MAY 2012 – REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
Limits in standard type are for TJ = 25°C unless otherwise stated; limits in boldface type apply over the operating junction
temperature range TJ of -40°C to 125°C. Minimum and maximum limits are specified through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes
only. Unless otherwise stated the following conditions apply: VIN =48 V, ILED = 350mA. VIN is the voltage applied across LED+
and GND. IIN is the input current flowing into the LED+ node. ILED is a LED current flowing into the LED- pin. VLED is the
voltage applied across LED+ and LED-. VDIM is the voltage applied across the DIM pin to ground. Resistor RIADJ connect from
IADJ pin to ground. Resistor RVREF connect from VREF pin to ground.
Symbol
Parameter
Conditions
Min (1)
Typ (2)
Max (1)
Units
SYSTEM PARAMETERS
IIN
Input Current
VLED = 0V, 4.5V ≤ VIN ≤ 60V, VDIM = 0V
2.1
2.65
3.0
mA
ILED
LED Current
VLED = 24V , RIADJ = 0Ω, RVREF = open, TJ = 25°C
340
350
364
mA
VLED = 24V, RIADJ = 0Ω, RVREF = open, TJ = 25°C to 125°C
337
350
364
VLED = 24V, RIADJ = 0Ω , RVREF = open,
337
350
371
TJ = -40°C to 125°C
ILED–60V
LED Current
VIN = 60V, VLED = 36V, RIADJ = 0Ω RVREF = open,
342
350
367
mA
at VIN = 60V
TJ = 25°C
VIN = 60V, VLED = 36V, RIADJ = 0Ω, RVREF = open,
338
350
367
TJ = 25°C to 125°C
VIN = 60V, VLED = 36V, RIADJ = 0Ω, RVREF = open,
338
350
374
TJ = -40°C to 125°C
ILED-ADJ1
Adjusted LED Current
VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ, TJ = 25°C
442
450
471
mA
VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ,
437
450
471
TJ = 25°C to 125°C
VLED = 24V, RIADJ = 0Ω, RVREF = 10.5kΩ,
437
450
483
TJ = -40°C to 125°C
ILED-ADJ2
Adjusted LED Current
VLED = 24V, RIADJ = 500Ω, RVREF = open, TJ = 25°C
288
300
309
mA
VLED = 24V, RIADJ = 500Ω, RVREF = open,
282
300
309
TJ = 25°C to 125°C
VLED = 24V, RIADJ = 500Ω, RVREF = open,
282
300
316
TJ = -40°C to 125°C
ILED-SHORT
LED Short Circuit
VLED = 0V, VIN = 60V, DIM = open
800
920
1020
mA
Current at VIN = 60V
ILED-LEAK
“LED-” pin leakage
VLED = 0V, VIN = operating max, DIM = 0V
1.2
µA
current
fSW
Switching Frequency
VLED = 24V, RIADJ = 0Ω, RVREF = open
720
800
920
kHz
VDIM
DIM Pin Threshold
VDIM Increasing
1.0
1.3
V
VDIM-HYS
DIM Pin Hysteresis
0.25
V
THERMAL CHARACTERISTICS
Thermal Shutdown
TJ Rising
170
°C
TSD
Temperature
Thermal Shutdown
TJ Rising
10
°C
TSD-HYS
Temp. Hysteresis
Junction to Ambient(3)
4 Layer JEDEC Printed Circuit Board, 100 vias, No air flow
19.3
°C/W
θJA
2 Layer JEDEC PCB, No air flow
21.5
θJC
Junction to Case
No air flow
1.9
°C/W
(1)
Min and Max limits are 100% production tested at an ambient temperature (TA) of 25°C. Limits over the operating temperature range are
specified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality
Level (AOQL).
(2)
Typical numbers are at 25°C and represent the most likely parametric norm.
(3)
θ JA measured on a 1.705” x 3.0” four layer board, with one ounce copper , thirty five 12 mil thermal vias, no air flow, and 1W power
dissipation.
Copyright © 2012–2013, Texas Instruments Incorporated
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