ZXLD1356Q Просмотр технического описания (PDF) - Diodes Incorporated.
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ZXLD1356Q Datasheet PDF : 28 Pages
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ZXLD1356Q
Q
Electrical Characteristics (VIN = 24V, @TA = +25°C, unless otherwise specified.)
Symbol
VSU
VSD
IINQoff
IINQon
VSENSE
VSENSEHYS
ISENSE
VREF
VREF/T
VADJ
VADJoff
VADJon
Parameter
Internal Regulator Start-Up Threshold
Internal Regulator Shutdown Threshold
Quiescent Supply Current With Output Off
Quiescent Supply Current With Output Switching
(Note 7)
Mean Current Sense Threshold Voltage
(Defines LED Current Setting Accuracy)
Sense Threshold Hysteresis
ISENSE Pin Input Current
Internal Reference Voltage
Temperature Coefficient of VREF
External Control Voltage Range on ADJ Pin for
DC Brightness Control (Note 8)
DC Voltage on ADJ Pin to Switch Device from
Active (on) State to Quiescent (OFF) State
DC Voltage on ADJ pin to switch device from
quiescent (OFF) State to Active (ON) State
Condition
—
—
ADJ Pin Grounded
ADJ Pin Floating, L = 68mH,
3 LEDsf = 360kHz
Measured on ISENSE Pin with Respect
to VIN VADJ = 1.25V; VIN = 18V
—
VSENSE = VIN -0.2
Measured on ADJ Pin with Pin
Floating
—
—
VADJ Falling
VADJ Rising
RADJ
ILXmean
RLX
ILX(leak)
DPWM(LF)
DCADJ(*)
Resistance Between ADJ Pin and VREF
Continuous LX Switch Current
LX Switch ‘On’ Resistance
LX Switch Leakage Current
Duty Cycle Range of PWM Signal Applied to
ADJ Pin During Low Frequency PWM Dimming
Mode
Brightness Control Range
DC Brightness Control Range
Start-Up Time
tSS
(See Graphs for More Details)
FLX
Operating Frequency
(See Graphs for More Details)
0< VADJ < VREF, VADJ > VREF +100mV
—
@ ILX = 0.55A
—
PWM Frequency <300Hz PWM
Amplitude = VREF
Measured on ADJ Pin
(Note 9)
Time taken for output current to reach
90% of final value after voltage on
ADJ pin has risen above 0.3V
Requires external capacitor 22nF
ADJ Pin Floating L= 68mH (0.36V)
IOUT = 0.55A @ VLED = 3.6V
Driving 3 LEDs
Min
—
4.40
—
—
195
—
—
—
—
0.3
0.15
0.2
30
10.4
—
—
—
0.001
—
—
—
—
Typ
4.85
4.75
65
1.6
200
±15
4
1.25
50
—
0.20
0.25
50
14.2
—
0.5
—
—
1,000:1
5:1
2
360
Max Unit
5.2
V
—
V
108 µA
—
mA
205 mV
—
%
10
µA
—
V
— ppm/°C
2.5
V
0.27
V
0.3
V
65
18.0
kΩ
0.55
A
0.75 Ω
5
µA
1
—
—
—
—
—
—
ms
—
kHz
Notes:
7. Static current of device is approximately 700µA, see Supply Current Graph, Page 15.
8. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE threshold and output current
proportionally.
9. Ratio of maximum brightness to minimum brightness before shutdown VREF =1.25/0.25. VREF externally driven to 2.5V, ratio 10.1.
ZXLD1356Q
Document number: DS37077 Rev. 2 - 2
4 of 28
www.diodes.com
October 2015
© Diodes Incorporated
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