參數(shù)資料
型號(hào): ISL8845A
廠商: Intersil Corporation
英文描述: High Performance Industry Standard Single-Ended Current Mode PWM Controller
中文描述: 高性能的行業(yè)標(biāo)準(zhǔn)單端電流模式PWM控制器
文件頁數(shù): 9/15頁
文件大?。?/td> 313K
代理商: ISL8845A
9
FN6320.3
April 18, 2007
Amplitude, Peak to Peak
Static Test
-
1.75
-
V
RTCT Discharge Voltage (Valley Voltage)
Static Test
-
1.0
-
V
Discharge Current
RTCT = 2.0V
6.2
8.0
8.5
mA
OUTPUT
Gate VOH
V
DD
- OUT, I
OUT
= -200mA
OUT - GND, I
OUT
= 200mA
C
OUT
= 1nF (Note 9)
C
OUT
= 1nF (Note 9)
C
OUT
= 1nF (Note 9)
V
DD
= 5V, I
LOAD
= 1mA
-
1.0
2.0
V
Gate VOL
-
1.0
2.0
V
Peak Output Current
-
1.0
-
A
Rise Time
-
20
40
ns
Fall Time
-
20
40
ns
GATE VOL UVLO Clamp Voltage
-
-
1.2
V
PWM
Maximum Duty Cycle
(ISL8840A, ISL8842A, ISL8843A)
COMP = VREF
94.0
96.0
-
%
Maximum Duty Cycle
(ISL8841A, ISL8844A, ISL8845A)
COMP = VREF
47.0
48.0
-
%
Minimum Duty Cycle
COMP = GND
-
-
0
%
NOTES:
7. Specifications at -55°C and
+
125°C
are guaranteed by +25°C test with margin limits.
8. This is the V
DD
current consumed when the device is active but not switching. Does not include gate drive current.
9. These parameters, although guaranteed, are not 100% tested in production.
10. Adjust V
DD
above the start threshold and then lower to 15V.
Electrical Specifications
ISL884xAM
-
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and
Typical Application schematic. V
DD
= 15V, RT = 10k
Ω
, CT = 3.3nF,
T
A
= -55 to +125°C
(Note 7), Typical values
are at T
A
= +25°C
(Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Typical Performance Curves
FIGURE 1. FREQUENCY vs TEMPERATURE
FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE
-60
-40
-20
0
TEMPERATURE (°C)
20
40
60
80
100 120 140
0.98
0.99
1.00
1.01
N
-60 -40 -20
0
20
40
60
80 100
0.995
0.996
0.997
0.998
0.999
1.000
1.001
TEMPERATURE (°C)
N
140
120
ISL8840A, ISL8841A, ISL8842A, ISL8843A, ISL8844A, ISL8845A
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