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744770933 Scheda tecnica(PDF) 3 Page - Diodes Incorporated

Il numero della parte 744770933
Spiegazioni elettronici  60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER
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Produttore elettronici  DIODES [Diodes Incorporated]
Homepage  http://www.diodes.com
Logo DIODES - Diodes Incorporated

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ZXLD1370
ZXLD1370
Document number: DS32165 Rev. 2 - 2
3 of 33
www.diodes.com
May 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)
Symbol
Parameter
Rating
Unit
VIN
Input supply voltage relative to GND
-0.3 to 65
V
VAUX
Auxiliary supply voltage relative to GND
-0.3 to 65
V
VISM
Current monitor input relative to GND
-0.3 to 65
V
VSENSE
Current monitor sense voltage (VIN-VISM)
-0.3 to 5
V
VGATE
Gate driver output voltage
-0.3 to 20
V
IGATE
Gate driver continuous output current
18
mA
VFLAG
Flag output voltage
-0.3 to 40
V
VPWM, VADJ,
VTADJ, VGI,
VPWM
Other input pins
-0.3 to 5.5
V
TJ
Maximum junction temperature
150
°C
TST
Storage temperature
-55 to 150
°C
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.
Operation at the absolute maximum rating for extended periods may reduce device reliability.
Recommended Operating Conditions
Symbol
Parameter
Performance/Comment
Min
Max
Unit
VIN
Input supply voltage range
Normal operation
8
60
V
Functional (Note 1)
6.3
VAUX
Auxiliary supply voltage range (Note 2)
Normal operation
8
60
V
Functional
6.3
VISM
Current sense monitor input range
6.3
60
V
VSENSE
Differential input voltage
VVIN-VISM, with 0 ≤ VADJ ≤ 2.5
0
450
mV
VADJ
External dc control voltage applied to ADJ
pin to adjust output current
DC brightness control mode
from 10% to 200%
0.125
2.5
V
IREF
Reference external load current
REF sourcing current
1
mA
fmax
Recommended switching frequency range
(Note 3)
300
1000
kHz
VTADJ
Temperature adjustment (TADJ) input voltage
range
0
VREF
V
fPWM
Recommended PWM dimming frequency range
(Note 4)
To achieve 1000:1 resolution
100
500
Hz
To achieve 500:1 resolution
100
1000
Hz
tPWMH/L
PWM pulse width in dimming mode
PWM input high or low
0.002
10
ms
VPWMH
PWM pin high level input voltage
2
5.5
V
VPWML
PWM pin low level input voltage
0
0.4
V
TJ
Operating Junction Temperature Range
-40
125
°C
GI
Gain setting ratio for boost and buck-boost modes
Ratio= VGI/VADJ
0.20
0.50
Notes:
1. The functional range of VIN is the voltage range over which the device will function. Output current and device parameters may deviate from their
normal values for VIN and VAUX voltages between 6V and 8V, depending upon load and conditions.
2. VAUX can be driven from a voltage higher than VIN to provide higher efficiency at low VIN voltages, but to avoid false operation; a voltage should not
be applied to VAUX in the absence of a voltage at VIN.
3. The device contains circuitry to control the switching frequency to approximately 400kHz. The maximum and minimum operating frequency are not
tested in production.
4. This gives maximum resolution at the expense of accuracy. To ensure accuracy the following equation should be used: 2*Resolution *fPWM < fSWH


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