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ISL1903 Datasheet, PDF (10/19 Pages) Intersil Corporation – Dimmable Buck LED Driver - AC Mains or DC Input LED Driver
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ISL1903
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram -
ISL1903” on page 2 and “Typical Application schematics” beginning on page 3. VDD = 17V, RRAMP = 54kΩ, CRAMP = 470pF, TA = -40°C to
+125°C, Typical values are at TA = +25°C; Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 7)
TYP
(Note 7)
UNITS
EA Reference vs AC Conduction Angle
ILPOUT = 0µA, f = 120Hz (rectified),
8V < VDD< 26V
Duty Cycle (α) = 98%
523
548
574
mV
Duty Cycle (α) = 75%
286
318
340
mV
Duty Cycle (α) = 50%
117
139
156
mV
Duty Cycle (α) = 25%
16
33
44
mV
Duty Cycle (α) = 10%
0
3
11
mV
DHC
Low Level Output Voltage (VOL)
VDHC = 10mA,
VDD = 8V operating
-
-
600
mV
Turn-off Delay after AC Returns
-
4.0
-
µs
SOFT-START
Duration
289
389
483
ms
Reference Soft Start Initial Step
11
27
43
mV
OFFREF
Input Bias Current
-1.0
-
1.0
µA
Operating Range (Excluding Offset)
0
-
0.5
V
Threshold Hysteresis
33
52
70
mV
Threshold Offset
78
104
129
mV
AC Dropout Disable Delay
-
32
ms
OUT
High Level Output Voltage (VOH)
VOUT @ 0mA - VOUT @ -100mA,
VDD = 8V operating
-
0.35
1.2
V
Low Level Output Voltage (VOL)
Rise Time
Fall Time
Output Clamp Voltage
Unbiased Output Voltage Clamp
PWMOUT
VOUT @ 100mA, VDD = 8V operating
-
0.7
1.2
V
CLOAD = 2.2nF, VDD = 8V,
t90% - t10%
-
35
55
ns
CLOAD = 2.2nF, VDD = 8V,
t10% - t90%
-
25
40
ns
VDD = 20V, ILOAD = -10µA
10.5
12.0
13.4
V
VDD = 6V, ILOAD = 5mA
-
-
1.9
V
High Level Output Voltage (VOH)
VOUT @ 0mA - VOUT @ -10mA,
VDD = 8V operating
-
0.8
1.2
V
Low Level Output Voltage (VOL)
VOUT @ 10mA,
VDD = 8V operating
-
0.8
1.2
V
Rise Time
Fall Time
Output Voltage Clamp
CLOAD = 1nF, VDD = 8V operating,
-
t90% - t10%
160
240
ns
CLOAD = 1nF, VDD = 8V operating,
-
t10% - t90%
160
240
ns
VDD = 20V, ILOAD = -10µA
10.5
12.0
13.4
V
10
FN8285.1
September 20, 2012
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