参数资料
| 型号： | NCP1396BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/25页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM VM 16-SOIC |
| 产品变化通告： | Package Pin Removal 11/Feb/2008 |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 575kHz |
| 占空比： | 52% |
| 电源电压： | 10.5 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽）15 引线 |
| 包装： | 标准包装 |
| 其它名称： | NCP1396BDR2GOSDKR |
NCP1396A, NCP1396B
V CC
F Mu&Lu
No variations
Fmax
450 kHz
FB
R1
11.3 k
+
--
Δ Fsw = 300 kHz
+
R3
100 k
R2
8.7 k
D1
2.3 V
Vref
0.5 V
Fmax
Rfmax
Fmin
Fault
area
1.2 V Δ VFB = 4.1 V
5.3 V
150 kHz
VFB
0.6 V
= 109.7 kHz ∕ V
Figure 32. The OPAMP Arrangement Limits the
VCO Modulation Signal between 0.5 and 2.3 V
This techniques allows us to detect a fault on the
converter in case the FB pin cannot rise above 0.6 V (to
actually close the loop) in less than a duration imposed by
the programmable timer. Please refer to the fault section for
detailed operation of this mode.
As shown on Figure 32, the internal dynamics of the
VCO control voltage will be constrained between 0.5 V
and 2.3 V, whereas the feedback loop will drive pin 6 (FB)
between 1.2 V and 5.3 V. If we take the default FB pin
excursion numbers, 1.2 V = 50 kHz, 5.3 V = 500 kHz, then
the VCO maximum slope will be:
500 k ? 50 k
4.1
Figures 33 and 34 portray the frequency evolution
depending on the feedback pin voltage level in a different
frequency clamp combination.
Figure 34. Here a different minimum frequency was
programmed as well as a maximum frequency
excursion
Please note that the previous small-- signal VCO slope has
now been reduced to 300 k / 4.1 = 73 kHz / V on Mupper
and Mlower outputs. This offers a mean to magnify the
feedback excursion on systems where the load range does
not generate a wide switching frequency excursion. Thanks
to this option, we will see how it becomes possible to
observe the feedback level and implement skip cycle at
light loads. It is important to note that the frequency
evolution does not have a real linear relationship with the
feedback voltage. This is due to the deadtime presence
which stays constant as the switching period changes.
The selection of the three setting resistors (Fmax, Fmin
deadtime) requires the usage of the selection charts
displayed below:
650
F Mu&Lu
550
V CC = 12 V
FB = 6.5 V
Fmax
No variations
500 kHz
450
DT = 300 ns
350
Δ Fsw = 450 kHz
250
Fmin = 200 kHz
Fmin
50 kHz
150
Fmin = 50 kHz
Fault
area
1.2 V Δ VFB = 4.1 V
5.3 V
VFB
50
1.5 3.5
5.5
7.5 9.5 11.5 13.5
RFmax (k Ω )
15.5 17.5
0.6 V
Figure 33. Maximal Default Excursion, Rt =
22 k Ω on pin 4 and Rfmax = 1.3 k Ω on pin 2
Figure 35. Maximum Switching Frequency Resistor
Selection Depending on the Adopted Minimum
Switching Frequency
http://onsemi.com
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1396BPG | 功能描述:电压模式 PWM 控制器 RESONANT MODE CNTRLR W/ H/L SIDES DRIVERS RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| NCP1396D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller featuring High--Voltage Drivers |
| NCP1397A | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
| NCP1397ADR2G | 功能描述:电流型 PWM 控制器 NCP1397A RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP1397B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
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