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TB62756FUG Fiches technique(PDF) 6 Page - Marktech Corporate

No de pièce TB62756FUG
Description  Step-up Type DC/DC Converter for White LEDs
Download  14 Pages
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Fabricant  MARKTECH [Marktech Corporate]
Site Internet  http://www.marktechopto.com
Logo MARKTECH - Marktech Corporate

TB62756FUG Fiches technique(HTML) 6 Page - Marktech Corporate

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TB62756FUG
2005-11-8
6
Absolute Maximum Ratings (Ta = 25°C, unless otherwise specified)
Characteristics
Symbol
Ratings
Unit
Power supply voltage
VIN
−0.3 to 6.0
V
Input voltage
VSHDN
−0.3 to VIN + 0.3(Note3)
V
Switching pin voltage
VO (SW)
−0.3 to 24
V
Switching pin current
IO (SW)
380
mA
0.41 (IC only)
Power Dissipation
PD
0.47 (IC mounted on PCB)(Note4)
W
Rth (j-a) 1
300 (IC only)
Thermal resistance
Rth (j-a) 2
260 (IC mounted on PCB)
°C/W
Operating temperature range
Topr
−40 to 85
°C
Storage temperature
Tstg
−55 to 150
°C
Maximum junction temperature
Tj
150
°C
Note3: However, do not exceed 6V.
Note4: Power dissipation is reduced by 3.8mW/°C from the maximum rating for every 1°C exceeding the ambient
temperature of 25°C (when the IC is mounted on a PCB).
Recommended Operating Condition (Ta = −40 to 85°C, unless otherwise specified)
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Power supply voltage
VIN
2.8
5.5
V
SHDN pin input pulse width
tpw
ON/OFF duty width
33
µs
LED current (Average value)
IF1
VIN = 3.6 V, RSENS = 16 Ω
4LEDs, Ta = 25°C
20
A
Electrical Characteristics (Ta = 25°C VIN = 2.8~5.5 V, unless otherwise specified)
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Operating consumption current
IIN (ON)
VIN = 6.0 V, RSENS = 16 Ω
0.9
1.5
mA
Standby consumption current
IIN (OFF)
VIN = 3.6 V, VSHDN = 0 V
0.5
1.0
µA
SHDN pin H level input voltage
VSHDN (H)
1.3
VIN
V
SHDN pin L level input voltage
VSHDN (L)
0
0.4
V
SHDN pin current
ISHDN
VIN = 3.6 V, VSHDN = 3.6 V
−10
0
10
µA
Integrated MOS-FET switching
frequency
fOSC
VIN = 3.6 V, VSHDN = 3.6 V
0.77
1.1
1.43
MHz
Switching pin protection voltage
VO (SW)
25
V
Switching pin current
IO (SW)
400
mA
Switching pin leakage current
IOZ (SW)
0.5
1
µA
FB pin feedback voltage
VFB
VIN = 3.6 V, RSENS = 16 Ω
L = 4.7
µH
308
325
342
mV
FB pin line regulation
∆VFB
VIN = 3.6 V center
VIN = 3.0V to 5.0V
−5
5
%


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