參數(shù)資料
型號(hào)： AN8017SA
廠商： PANASONIC CORP
元件分類： 穩(wěn)壓器
英文描述： 1.8-volt 2-channel step-up DC-DC converter control IC
中文描述： 0.08 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.225 INCH, 0.65 MM PITCH, PLASTIC, SSOP-16
文件頁(yè)數(shù)： 15/25頁(yè)
文件大?。?/td> 205K
代理商： AN8017SA
Voltage Regulators
AN8017SA
15
I
Application Notes (continued)
[4] Function descriptions (continued)
5. Timer latch short-circuit protection circuit
This circuit protects the external main switching devices, flywheel diodes, and choke coils, etc. from
destruction or deterioration if overload or short-circuit condition of power supply output lasts for a certain time.
The timer latch short-circuit protection circuit detects the output level of the error amplifier. When the output
voltage of DC-DC converter drops and the output level of error amplifier 1 block exceeds 0.9 V or the output level
of error amplifier 2 block exceeds 0.22 V, the low-level output is given and the timer circuit is actuated to start the
charge of the external protection-enable capacitor.
If the output of the error amplifier does not return to a normal voltage range by the time when the voltage of
this capacitor reaches 1.22 V, it sets the latch circuit, and cuts off the output drive transistor, and sets the dead-time
to 100%.
6. Low input voltage malfunction prevention circuit (U.V.L.O.)
This circuit protects the system from destruction or deterioration due to control malfunction when the supply
voltage is low in the transient state of power on/off.
The low input voltage malfunction prevention circuit detects the internal reference voltage which changes
according to the supply voltage level. Until the supply voltage reaches 1.67 V during its rise time, it cuts off the
output drive transistor, and sets the dead-time to 100%. At the same time, it holds the S.C.P. terminal (pin 2) and
DT1 terminal (pin 5) to low-level and the OSC terminal (pin 1) and DT2 terminal (pin 12) to high-level.
7. PWM comparator block
The PWM comparator controls the on-period of the output pulse according to the input voltage. The PWM1
and PWM2 block are reverse logic relation.
The PWM1 block turns on the output transistor during the period when the triangular wave of OSC terminal
(pin 1) is lower than any lower one of the FB1 (pin 4) terminal voltage and the DT1 (pin 5) terminal voltage.
The PWM2 block turns on the output transistor during the period when the triangular wave of OSC terminal
(pin 1) is higher than any higher one of the FB2 (pin 13) terminal voltage and the DT2 (pin 12) terminal voltage.
The maximum duty ratio is variable from the outside.
Also, the soft start which gradually extends on-period of the output pulse is activated by connecting a capacitor
in parallel with the resistor-dividing for the maximum duty ratio setting.
8. Unlatch block
The unlatch circuit 1 block fixes the FB1 terminal (pin 4) at low-level at the DT1 terminal (pin 5) is 0.20 V or
less. The unlatch circuit 2 block fixes the FB2 terminal (pin 13) at high-level at the DT2 terminal (pin 12) is 0.9
V or less. Consequently, by controlling the DT terminal voltage, it is possible to operate only one channel or to
start and stop each channel in any required sequence.
9. Output 1 block
This block uses a totem pole type output circuit. By connecting the current setting resistor to the RB1 terminal,
it is possible to arbitrarily set a constant-current source-output having a small fluctuation with the supply voltage.
The available constant-current source-output is up to 50 mA. The breakdown voltage of output terminal is 15 V.
10. Output 2 block
This block uses a totem pole type output circuit. By connecting the current setting resistor to the RB2 terminal,
it is possible to arbitrarily set a constant-current source-output having a small fluctuation with the supply voltage.
The available constant-current source-output is up to 50 mA. The breakdown voltage of output terminal is 15 V.
相關(guān)PDF資料
PDF描述
AN8021SB AC-DC switching power supply control IC
AN8021NS External excitation flyback AC-DC switching power supply control IC
AN8021L AC-DC switching power supply control IC
AN8022L AC-DC switching power supply control IC
AN8022SB AC-DC switching power supply control IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AN8017SA-E1 功能描述:IC REG CTRLR BST PWM 16-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)
AN8017SA-E1V 功能描述:IC REG CTRLR BST PWM SSOP16 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)
AN8018 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC
AN8018SA 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC
AN8018SA-E1 功能描述:IC REG CTRLR BST INV PWM 16-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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*