参数资料
| 型号： | NCP1282BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK VM 16SOIC |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 占空比： | 85% |
| 电源电压： | 8.5 V ~ 20 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP1282BDR2GOSCT |
NCP1282
ELECTRICAL CHARACTERISTICS (V in = 48 V, V AUX = 12 V, V UVOV = 2.3 V, V EA = open, V CSKIP = 0 V, V CS = 0 V, V SS = open,
R T = 13.3 k Ω , C AUX = 10 m F, C T = 470 pF, C out1 = C out2 = 100 pF, C UVOV = 0.01 m F, C CSKIP = 6800 pF, R D = 25 k Ω , R SYNC = 5.0 k Ω ,
C REF = 0.1 m F, R FF = 29.4 k Ω , C FF = 470 pF. For typical values T J = 25 ? C, for min/max values, T J is – 40 ? C to 125 ? C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
STARTUP CONTROL AND V AUX REGULATOR
V AUX Regulation (V UVOV = 0 V)
Inhibit Threshold Voltage
Startup Threshold/V AUX Regulation Peak (V AUX Increasing)
Operating V AUX Valley Voltage
Minimum Operating V AUX Valley Voltage after Turn--On
(V UVOV = 2.3 V, V EA = 0 V)
Minimum Startup Voltage (Pin 1)
I AUX = 1.0 mA, V AUX = V AUX(on) – 0.2 V
Inhibit Bias Current
V AUX = 0 V
Startup Circuit Output Current
V AUX = V inhibit + 0.2 V
V AUX = V AUX(on) – 0.2 V
Startup Circuit Off--State Leakage Current (V in = 500 V, V UVOV = 0 V)
T J = 25 ? C
T J = –40 ? C to 125 ? C
Startup Circuit Breakdown Voltage (Note 3)
I start(off) = 50 m A, T J = 125 ? C
Auxiliary Supply Current after V AUX Turn--On
Outputs Disabled
V UVOV = 0 V
V EA = 0 V
Outputs Enabled
V EA = 4.0 V
V inhibit
V AUX(on)
V AUX(off1)
V AUX(off2)
V start(min)
I inhibit
I start1
I start2
I start(off)
V BR(DS)
I AUX1
I AUX2
I AUX3
–
10.6
8.9
8.0
–
70
7.16
4.03
–
–
500
–
–
–
1.15
11.1
9.4
8.4
–
171
9.3
6.1
25
–
–
3.1
4.3
4.9
1.6
11.6
9.9
9.0
23.2
300
11.3
8.1
50
100
–
3.6
4.94
7.0
V
V
m A
mA
m A
V
mA
LINE UNDER/OVERVOLTAGE DETECTOR
Undervoltage Threshold (V in Increasing)
Undervoltage Hysteresis
Undervoltage Ratio (V UV(H) /V UV )
Overvoltage Threshold (V in Increasing)
Overvoltage Hysteresis
Offset Current (V UVOV = 2.8 V)
Offset Current Turn ON Threshold ( ? 5%, I offset(UVOV) = 40 m A)
V UV
V UV(H)
V UV(ratio)
V OV
V OV(H)
I offset(UVOV)
V offset(UVOV)
1.979
0.074
3.65
2.80
0.075
38
2.4
2.05
0.093
4.5
2.95
0.093
48
2.6
2.116
0.118
5.62
3.10
0.127
58
2.8
V
V
%
V
V
m A
V
LINE FEEDFORWARD
Peak Voltage (Volt--Second Clamp)
Discharge Current (V FF = 0.5 V, V SS = 0 V)
Offset Voltage (V FF = 0 V, Ramp Down V SS )
Feedforward Offset Minus Soft--Stop Reset Voltage
V FF(peak)
I FF(D)
V offset(FF)
Δ (FF--SS)
2.8
8.5
0.118
7
3.0
–
0.185
70
3.2
–
0.268
183
V
mA
V
mV
3. Guaranteed by design only.
http://onsemi.com
5
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