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| 型号： | ISL6845IUZ-T |
| 厂商： | Intersil |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK ISO 8MSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 占空比： | 50% |
| 电源电压： | 9 V ~ 16 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” and
“Typical Application” schematic on pages 3 and 4. V DD = 15V (Note 12), R t = 10k Ω , C t = 3.3nF,
T A = -40°C to +105°C (Industrial) or T A = 0°C to +70°C (Commercial), Typical values are at T A = +25°C.
Boldface limits apply over the operating temperature range, -40°C to +105°C or 0°C to +70°C . (Continued)
MIN
MAX
PARAMETER
Current Limit, Sourcing
Current Limit, Sinking
TEST CONDITIONS
(Note 9)
-20
5
TYP
-
-
(Note 9)
-
-
UNITS
mA
mA
CURRENT SENSE
Input Bias Current
CS Offset Voltage
COMP to PWM Comparator Offset Voltage
Input Signal, Maximum
Input Signal, Maximum (ISL6843C Only)
Gain, A CS = Δ V COMP / Δ V CS
CS to OUT Delay
CS to OUT Delay (ISL6843C Only)
V CS = 1V
V CS = 0V (Note 11)
V CS = 0V (Note 11)
0 < V CS < 910mV, V FB = 0V (Note 11)
(Note 11)
(Note 11)
-1.0
95
0.80
0.91
0.9
2.5
-
-
100
1.15
0.97
0.97
3.0
25
1.0
105
1.30
1.03
1.07
3.5
40
70
μA
mV
V
V
V
V/V
ns
ns
ERROR AMPLIFIER
Open Loop Voltage Gain
Open Loop Voltage Gain (ISL6843C Only)
Unity Gain Bandwidth
Reference Voltage
FB Input Bias Current
COMP Sink Current
COMP Source Current
COMP VOH
COMP VOL
PSRR
(Note 11)
(Note 11)
(Note 11)
V FB = V COMP
V FB = 0V
V COMP = 1.5V, V FB = 2.7V
V COMP = 1.5V, V FB = 2.3V
V FB = 2.3V
V FB = 2.7V
Frequency = 120Hz, V DD = 12V to 18V (Note 11)
60
55
3.5
2.475
-1.0
1.0
-0.4
4.80
0.4
60
90
5
2.514
-0.2
-
-
-
-
80
-
-
2.55
1.0
-
-
VREF
1.0
-
dB
dB
MHz
V
μA
mA
mA
V
V
dB
OSCILLATOR
Frequency Accuracy
Frequency Variation with V DD
Temperature Stability
Amplitude, Peak-to-Peak
RTCT Discharge Voltage
Discharge Current
Initial, T J = +25°C
T = +25°C (f 18V - f 12V )/f 12V
(Note 11)
RTCT = 2.0V
49
-
-
-
-
7.2
52
0.2
-
1.9
0.7
8.4
55
1.0
5
-
-
9.5
kHz
%
%
V
V
mA
OUTPUT
Gate VOH
Gate VOL
Peak Output Current
Rise Time
Fall Time
V DD to OUT, I OUT = -200mA
OUT to GND, I OUT = 200mA
C OUT = 1nF (Note 11)
C OUT = 1nF (Note 11)
C OUT = 1nF (Note 11)
-
-
-
-
-
1.0
1.0
1.0
20
20
2.0
2.0
-
40
40
V
V
A
ns
ns
PWM
7
FN9124.11
February 23, 2012
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