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ISL1903 数据表(PDF) 11 Page - Intersil Corporation

部件名 ISL1903
功能描述  Dimmable Buck LED Driver - AC Mains or DC Input LED Driver
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制造商  INTERSIL [Intersil Corporation]
网页  http://www.intersil.com/cda/home
标志 INTERSIL - Intersil Corporation

ISL1903 数据表(HTML) 11 Page - Intersil Corporation

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ISL1903
11
FN8285.1
September 20, 2012
Unbiased Output Voltage Clamp
VDD = 6V, ILOAD = 3mA
-
-
1.9
V
Frequency
291
320
349
Hz
Maximum Duty Cycle
REFIN = 0.5V
-
-
100
%
Minimum On-Time
REFIN = 0V
-
-
0.5
μs
OVP
OVP Threshold
1.46
1.50
1.54
V
OVP Hysteresis
10
20
27
μA
Input Bias Current
-1.0
-
1.0
μA
OVP Clamp Voltage
IOVP = 1mA
5.4
-
7.0
V
THERMAL PROTECTION
Thermal Shutdown
(Note 8)
150
160
170
°C
Hysteresis
(Note 8)
-
25
-
°C
NOTES:
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
8. Limits established by characterization and are not production tested.
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
(Note 7)
TYP
MAX
(Note 7)
UNITS
Test Waveforms and Circuits
FIGURE 2. RISE/FALL TIME TEST CIRCUIT
FIGURE 3. RISE/FALL TIMES
9
10
11
12
13
14
15
16
1
2
4
3
5
6
7
8
CS+
DHC
OFFREF PWMOUT
VREF
OUT
VDD
OC
OVP
AC
IOUT
RAMP
GND
FB
DELADJ
VERR
ISL1903
8V
1nF
2.2nF
470pF
5k
54k
0 TO1V 120Hz
OUT
OR
PWMOUT
tR
tF
90%
10%


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