744770933 Просмотр технического описания (PDF) - Diodes Incorporated.
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744770933 Datasheet PDF : 33 Pages
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A Product Line of
Diodes Incorporated
Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)
Symbol
Parameter
Rating
VIN
VAUX
VISM
VSENSE
VGATE
IGATE
VFLAG
VPWM, VADJ,
VTADJ, VGI,
VPWM
TJ
TST
Input supply voltage relative to GND
Auxiliary supply voltage relative to GND
Current monitor input relative to GND
Current monitor sense voltage (VIN-VISM)
Gate driver output voltage
Gate driver continuous output current
Flag output voltage
Other input pins
Maximum junction temperature
Storage temperature
-0.3 to 65
-0.3 to 65
-0.3 to 65
-0.3 to 5
-0.3 to 20
18
-0.3 to 40
-0.3 to 5.5
150
-55 to 150
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.
ZXLD1370
Unit
V
V
V
V
V
mA
V
V
°C
°C
Recommended Operating Conditions
Symbol
Parameter
Performance/Comment
Min Max Unit
VIN
Input supply voltage range
Normal operation
Functional (Note 1)
8
6.3
60
V
VAUX
Auxiliary supply voltage range (Note 2)
Normal operation
Functional
8
6.3
60
V
VISM
VSENSE
VADJ
Current sense monitor input range
Differential input voltage
External dc control voltage applied to ADJ
pin to adjust output current
6.3
60
V
VVIN-VISM, with 0 ≤ VADJ ≤ 2.5
0
450 mV
DC brightness control mode
from 10% to 200%
0.125 2.5
V
IREF
Reference external load current
fmax
Recommended switching frequency range
(Note 3)
REF sourcing current
1
mA
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
To achieve 500:1 resolution
100 500 Hz
100 1000 Hz
tPWMH/L
VPWMH
VPWML
TJ
GI
PWM pulse width in dimming mode
PWM pin high level input voltage
PWM pin low level input voltage
Operating Junction Temperature Range
Gain setting ratio for boost and buck-boost modes
PWM input high or low
Ratio= VGI/VADJ
0.002 10
ms
2
5.5
V
0
0.4
V
-40
125
°C
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
ZXLD1370
Document number: DS32165 Rev. 2 - 2
3 of 33
www.diodes.com
May 2010
© Diodes Incorporated
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