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)： 8/18頁(yè)
文件大?。?/td> 151K
代理商： AN8014S
AN8014S
Voltage regulators
8
I
Application Notes (continued)
[1] Function descriptions (continued)
2. The triangular wave generator block (OSC)
The triangular wave which swings from approximately 1.32 V (upper limit value, V
OSCH
) to approximately 0.44
V (lower limit value, V
OSCL
) will be generated by connecting a timing capacitor C
T
and a resistor R
T
to the C
T
pin
(pin 3) and R
T
pin (pin 2) respectively. Oscillator frequency can be freely decided by the value of C
T
and R
T
connected externally. The oscillator frequency f
OSC
is obtained by the following formula;
1
=
t
1
+ t
2
2
×
C
T
×
(V
CTH
V
CHL
)
I
O
=
1.7
×
V
RT
=
1.7
×
0.4
R
T
R
T
Because V
CTH
V
CTL
=
0.88 V
1
[Hz]
2.59
×
C
T
×
R
T
f
OSC
=
I
O
f
OSC
≈
Example) An f
OSC
of approximately 215 kHz will be
obtained if C
T
is 120 pF and RT is 15 k
.
It is possible to use the circuit in the recommended operating range of 5 kHz to 500 kHz of the oscillator
frequency. As the AN8014S is used at increasingly higher frequencies, the amount of overshoot and undershoot
due to the operation delay in the triangular wave oscillator comparator increases, and discrepancies between the
values calculated as described previously and the actual values may occur.
The output source currents of the AN8014S's S.C.P. and DTC pins are determined by the timing resistor R
T
which is externally connected to the RT pin. Therefore, note that this IC can not be used as an IC for slave when
the several ICs are operated in parallel synchronous mode.
3. Error amplifier block
Detecting and amplifying DC-DC converter output voltage, the error amplifier with PNP transistor input inputs
the signal to the PWM comparator.
Figure 2 shows the way to connect the error amplifier.
The common-mode input voltage range is
0.1 V to
+
0.8 V, and a voltage obtained by dividing the reference
voltage with built-in resistors is applied to the non-inverting input. Connecting the feedback resistor and the
capacitor between the error amplifier output pin (pin 8) and the inverting input pin (pin 7) allows the arbitrary gain
setting and the phase compensation.
Startup overshooting caused by feedback delays will be suppressed by setting the output source current and
output sink current to as high as 110
μ
A and 8 mA respectively.
The input voltage V
IN
+
and V
IN
to the error amplifier are obtained from the following formulas.
R
4
V
IN
=
V
OUT
×
R
3
+
R
4
R
1
+
R
2
V
IN
+
=
V
REF
×
R
2
t
1
t
2
T
Figure 1. Triangular oscillation waveform
V
CTH
= 1.32 V (typ.)
V
CTL
= 0.44 V (typ.)
Charging Discharging
PWM comparator
CT
DTC
R3
R4
V
REF
R
NF
C
NF
FB
Figure 2. Connection method of error amplifier
IN
+
IN
Error
amp.
1
6
7
8
13
V
OUT
R1
R2
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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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