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ISL8843 Datasheet(PDF) 5 Page - Intersil Corporation

Part No. ISL8843
Description  Industry Standard Single-Ended Current Mode PWM Controller
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL8843 Datasheet(HTML) 5 Page - Intersil Corporation

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5
FN9238.0
October 19, 2005
FB Input Bias Current
VFB = 0V
-1.0
-0.2
1.0
µA
COMP Sink Current
VCOMP = 1.5V, VFB = 2.7V
1.0
-
-
mA
COMP Source Current
VCOMP = 1.5V, VFB = 2.3V
-0.4
-
-
mA
COMP VOH
VFB = 2.3V
4.80
-
VREF
V
COMP VOL
VFB = 2.7V
0.4
-
1.0
V
PSRR
Frequency = 120Hz, VDD = 12V to
18V (Note 5)
60
80
-
dB
OSCILLATOR
Frequency Accuracy
Initial, TA = 25°C
485153
kHz
Frequency Variation with VDD
TA= 25°C, (F30V - F9V)/F30V
-0.2
1.0
%
Temperature Stability
(Note 5)
-
-
5
%
Amplitude, Peak to Peak
Static Test
-
1.75
-
V
RTCT Discharge Voltage (Valley Voltage)
Static Test
-
1.0
-
V
Discharge Current
RTCT = 2.0V
6.5
7.8
8.5
mA
OUTPUT
Gate VOH
VDD - OUT, IOUT = -200mA
-
1.0
2.0
V
Gate VOL
OUT - GND, IOUT = 200mA
-
1.0
2.0
V
Peak Output Current
COUT = 1nF (Note 5)
-
1.0
-
A
Rise Time
COUT = 1nF (Note 5)
-
20
40
ns
Fall Time
COUT = 1nF (Note 5)
-
20
40
ns
GATE VOL UVLO Clamp Voltage
VDD = 5V, ILOAD = 1mA
-
-
1.2
V
PWM
Maximum Duty Cycle
COMP = VREF
93.5
95
-
%
Minimum Duty Cycle
COMP = GND
-
-
0
%
NOTES:
3. Specifications at -40°C and 105°C are guaranteed by 25°C test with margin limits.
4. This is the VDD current consumed when the device is active but not switching. Does not include gate drive current.
5. Guaranteed by design, not 100% tested in production.
Electrical Specifications
ISL8843M - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and
Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -55 to 125°C (Note 6), Typical values
are at TA = 25°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
UNDERVOLTAGE LOCKOUT
START Threshold
8.0
8.4
9.0
V
STOP Threshold
7.3
7.6
8.0
V
Hysteresis
-0.8
-
V
Startup Current, IDD
VDD < START Threshold
-
90
125
µA
Operating Current, IDD
(Note 7)
-
2.9
4.0
mA
Operating Supply Current, ID
Includes 1nF GATE loading
-
4.75
5.5
mA
REFERENCE VOLTAGE
Overall Accuracy
Over line (VDD = 12V to 18V), load,
temperature
4.900
5.000
5.050
V
Electrical Specifications
ISL8843A - Recommended operating conditions unless otherwise noted. Refer to Block Diagram and
Typical Application schematic. VDD = 15V, RT = 10kΩ, CT = 3.3nF, TA = -40 to 105°C (Note 3) Typical values
are at TA = 25°C (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
ISL8843


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