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參數(shù)資料
| 型號： | AN8015SH |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single-channel step-down, step-up, or inverting use DC-DC converter control IC |
| 中文描述： | 0.1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | SSOP-10 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 131K |
| 代理商： | AN8015SH |
9
Voltage Regulators
AN8015SH
I
Application Notes (continued)
[3] Function descriptions
1. Reference voltage block
This block is composed of the band gap circuit, and outputs the temperature compensated 2.46 V reference
voltage to the V
REF
terminal (pin 7). The reference voltage is stabilized when the supply voltage is 3.6 V or higher,
and used as the operating power supply for the IC inside. It is possible to take out a load current of up to
3 mA .
Also, an overcurrent protection circuit is built in for the load, thereby protecting the IC from destruction when
V
REF
terminal is short circuited.
2. Triangular wave oscillation block
The triangular wave which swings from the highest wave of approximately 1.4 V to the lowest wave of
approximately 0.37 V will be generated by connecting a timing capacitor and a resistor to the CT terminal (pin 1) and
RT terminal (pin 2) respectively. The oscillation frequency can be freely decided by the value of C
T
and R
T
connected externally.
The triangular wave is connected with the inverted input of PWM comparator of the IC inside.
3. Error amplifier block
This block detects the output voltage of DC-DC converter by the PNP transistor input type error amplifier, and
inputs the amplified signal to the PWM comparator.
The common-mode input voltage range is
0.1 V to 0.8 V, and is a voltage obtained by dividing the reference
voltage with resistors.
Also, it is possible to perform the gain setting and the phase compensation arbitrarily by inserting the feedback
resistor and capacitor between the error amplifier output terminal (pin 10) and the inverted input terminal (pin 9).
The output voltage V
OUT
, if positive, is obtained by connecting the resistor-divided reference voltage to the
noninverted input terminal as shown in figure 3. 1), and the output voltage V
OUT
, if negative, is obtained by
connecting to the inverted input terminal as shown in figure 3. 2). The output voltages in each of these cases are
given in the following equations.
V
REF
R1
R2
7
PWM comparator
input
Error amp.
IN
+
8
IN
9
F
V
OUT
V
OUT
=
V
IN
+
Figure 3. Connection method of error amplifier
1) If output is positive
R3
R4
R
NF
C
NF
V
OUT
=
(V
REF
V
IN
)
V
REF
2) If output is negative
R3
+
R4
R3
×
R1
+
R2
R2
V
IN
+
=
V
REF
×
×
V
IN
=
V
REF
R4
R3
+
R4
×
R2
R1
+
R2
V
REF
R1
R2
7
PWM comparator
input
Error amp.
IN
+
8
IN
9
F
V
OUT
R3
R4
R
NF
C
NF
4. 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 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 amplifiers exceeds 1.85 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 1.83 V, it sets the latch circuit, cuts off the output drive transistor, and sets the dead-time at
100%.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 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 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 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 |
| AN8016NSH | 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 |
| AN8016NSHAVF | 功能描述:IC REG CTRLR BST 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:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
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