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參數(shù)資料
| 型號(hào)： | AN8014S |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Step-down, step-up, or inverting DC-DC converter control IC |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, SOP-16 |
| 文件頁(yè)數(shù)： | 11/18頁(yè) |
| 文件大小： | 151K |
| 代理商： | AN8014S |
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Voltage regulators
AN8014S
11
I
Application Notes (continued)
[1] Function descriptions (continued)
8. Overcurrent protection block
Utilizing that the overcurrent of power output is proportional to the current value which flows in the main switch
(power MOSFET), the block regulates the upper limit of the current flowing in the main switch, thus protects the
parts such as main switch device, a flywheel diode and a choke coil from the damage caused by the overcurrent.
The current detection are done by monitoring, at CLM pin (pin 10), the voltage drop in resistor which is placed
between the main switch device and V
CC
pin.
When the main switch device (power MOSFET) is switched on and the voltage of CLM pin reaches "V
CC
95 mV", threshold level for overcurrent detection, the output drive transistor is cut off so that no more current
flows in the main switch device. This control is repeated at each cycle. When overcurrent is detected once, the
transistor remains off during the same cycle, and is switched on in the next cycle.
Such an overcurrent detection method is called "Pulse-by-pulse overcurrent detection."
Output waveform (Out)
Triangular wave (CT)
Error amplifier output (FB)
Latch circuit reset signal
Overcurrent protection input (CLM)
Latch circuit set signal
(1) Overcurrent detection
(2) Latch set
(3) Output Off
(4) Latch reset
Figure 5. Waveforms of the pulse-by-pulse overcurrent protection operation
(5) Turned on in the next cycle
t
DLY
: Delay time
1.32 V
0.44 V
High
Low
V
CC
V
CC
95 mV
High
Low
High
Low
R2 and C1 shown in figure 6 constitute a low-pass
filter to eliminate noise due to parasitic capacitance when
the power MOSFET is turned on.
The cut-off frequency of the filter is obtained from
the following.
f
C
=
1
[Hz]
2
π
C
1
R
2
R2
R1
C1
In
Out
V-Out
CLM
Figure 6. CLM noise filter circuit
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| AN8014S-E1 | 功能描述:IC REG CTRLR BST INV PWM SO16 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF) |
| AN8015SH | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Single-channel step-down, step-up, or inverting use DC-DC converter control IC |
| AN8015SH-E1 | 功能描述:IC REG CTRLR BST INV PWM 10-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF) |
| AN8015SH-E1V | 功能描述:IC REG CTRLR BST INV PWM SSOP10 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF) |
| AN8016 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Single-channel 1.8-volt step-up DC-DC converter control IC |
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