參數(shù)資料
型號(hào): AN8016
廠商: Panasonic Corporation
元件分類: DC/DC變換器
英文描述: Single-channel 1.8-volt step-up DC-DC converter control IC
中文描述: 單聲道1.8伏升壓型DC - DC轉(zhuǎn)換器控制IC
文件頁(yè)數(shù): 11/17頁(yè)
文件大?。?/td> 134K
代理商: AN8016
Voltage Regulators
AN8016NSH
11
I
Application Notes (continued)
[4] Functional descriptions
1. Reference voltage block
This circuit is composed of a band gap circuit, and outputs a 1.26-volt temperature compensated reference
voltage. This reference voltage is stabilized when the supply voltage is 1.8 V or higher.
2. Triangular wave generator
This circuit generates a triangular wave like
sawtooth with a peak of 0.75 V and a trough of 0.2
V using a capacitor (for the time constant) and resis-
tor connected to the OSC pin (pin 9). The oscillator
frequency can be set to any value by selecting appro-
priate values for the external capacitor and resistor,
C
T
and R
T
. This oscillator can provide a frequency in
the range 20 kHz to 1 MHz. The triangular wave sig-
nal is provided to the inverting input of the PWM
comparator internally to the IC. Use the formulas
below for rough calculation of the oscillator fre-
quency.
f
OSC
1
0.75
×
1
[Hz]
C
T
×
R
T
×
ln V
OSCL
C
T
×
R
T
V
OSCH
Note, however, that the above formulas do not take the rapid charge time, overshoot, and undershoot into
account. See the experimentally determined graph of the oscillator frequency vs. timing capacitance value
provided in the main characteristics section.
3. Error amplifier
This circuit is an npn-transistor input error ampli-
fier that detects and amplifies the DC-DC converter
output voltage, and inputs that signal to a PWM com-
parator. The 1.27 V internal reference voltage is
applied to the noninverting input. Arbitrary gain and
phase compensation can be set up by inserting a re-
sistor and capacitor in series between the error am-
plifier output pin (pin 10) and the inverting input pin
(pin 1). The output voltage V
OUT
can be set by resis-
tor-dividing the output as shown in figure 2.
Figure 1. Triangular oscillator waveform
t
1
t
2
Discharge
Rapid
charge
T
V
OSCH
0.75 V
V
OSCL
0.2 V
FB
R1
R2
10
1.27 V
To the PWM
comparator input
Error
amplifier
IN
1
V
OUT
V
OUT
=
1.27
×
Figure 2. Connection method of error amplifier
R1
+
R2
R2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(wú) 升壓:是 回掃:是 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:8-TSSOP(0.173",4.40mm 寬) 包裝:帶卷 (TR)
AN8016NSH-E1 功能描述:IC REG CTRLR BST PWM 10-SSOP 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: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 包裝:帶卷 (TR)
AN8016NSHE1V 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: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 包裝:帶卷 (TR)
AN8016SHAE1V 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:75 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.3 V ~ 13.5 V 降壓:是 升壓:是 回掃:是 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:0°C ~ 70°C 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 包裝:管件 產(chǎn)品目錄頁(yè)面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5