参数资料
型号: NCP1234BD100R2G
厂商: ON Semiconductor
文件页数: 6/33页
文件大小: 0K
描述: IC REG CTRLR FLYBACK PWM 7SOIC
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 108kHz
占空比: 85%
电源电压: 9.5 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)7 引线
包装: 带卷 (TR)
NCP1234
ELECTRICAL CHARACTERISTICS (For typical values T J = 25 ? C, for min/max values T J = ? 40 ? C to +125 ? C, V HV = 125 V,
V CC = 11 V unless otherwise noted)
Characteristics
Test Condition
Symbol
Min
Typ
Max
Unit
FEEDBACK
Internal pull ? up resistor
V FB to internal current setpoint
division ratio
Internal pull ? up voltage on the
FB pin
T J = 25 ? C
R FB(up)
K FB
V FB(ref)
15
4.7
4.3
20
5
5
25
5.3
5.7
k W
?
V
CURRENT SENSE
Input Bias Current
Maximum internal current
setpoint
Propagation delay from V Ilimit
detection to DRV off
Leading Edge Blanking Duration
for V ILIM
Threshold for immediate fault
protection activation
Leading Edge Blanking Duration
for V CS(stop)
Slope of the compensation ramp
Soft ? start duration
V CS = 0.7 V
V FB > 3.5 V
V CS = V ILIM
From 1 st pulse to V CS = V ILIM
I bias
V ILIM
t delay
t LEB
V CS(stop)
t BCS
S comp(65kHz)
S comp(100kHz)
t SSTART
?
0.66
?
190
0.95
90
?
?
2.8
0.02
0.7
80
250
1.05
120
? 32.5
? 50
4.0
?
0.74
110
310
1.15
150
?
?
5.2
m A
V
ns
ns
V
ns
mV /
m s
ms
OVERPOWER COMPENSATION
V HV to I OPC conversion ratio
K OPC
?
0.54
?
m A / V
Current flowing out of CS pin
FB voltage above which I OPC is
applied
FB voltage below which is no
I OPC applied
Watchdog timer for dc operation
HV sampling level
V HV = 125 V
V HV = 162 V
V HV = 325 V
V HV = 365 V
V HV = 365 V
V HV = 365 V
I OPC(125)
I OPC(162)
I OPC(325)
I OPC(365)
V FB(OPCF)
V FB(OPCE)
t WD(OPC)
V HVsample
?
?
?
105
2.12
?
?
?
0
20
110
130
2.35
2.15
32
92
?
?
?
150
2.58
?
?
?
m A
V
V
ms
V
OVERCURRENT PROTECTION
Fault timer duration
Autorecovery mode latch ? off
time duration
From CS reaching V ILIMIT to DRV stop
t fault
t autorec
98
0.85
128
1.00
168
1.35
ms
s
FREQUENCY FOLDBACK
Feedback voltage threshold
below which frequency foldback
starts
Feedback voltage threshold
below which frequency foldback
is complete
V FB(foldS)
V FB(foldE)
1.8
1.22
2.0
1.35
2.2
1.48
V
V
Minimum switching frequency
V FB = V skip(in) + 0.2
f OSC(min)
22
27
32
kHz
SKIP ? CYCLE MODE
Feedback voltage thresholds for
skip mode
V FB going down
V FB going up
V skip(in)
V skip(out)
0.63
0.72
0.7
0.80
0.77
0.88
V
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