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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 11/14頁(yè) |
| 文件大?。?/td> | 131K |
| 代理商： | AN8015SH |
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11
Voltage Regulators
AN8015SH
I
Application Notes (continued)
[4] Triangular wave oscillation circuit (continued)
2. Usage notes
This IC uses the constant current given by the timing resistor R
T
as the bias current of the triangular oscillation
block and the PWM comparator for consumption current reduction. The total consumption current is approximately
1.8 mA (typical) when R
T
is 15 k
, and it increases to approximately 2.5 mA (typical) when R
T
is 5.6 k
. In order
to obtain the steady-state output current of 100 mA at the open collector output, it is necessary to set R
T
value to
15 k
or smaller.
It is possible to use the circuit in the recom-
mended operating range of 2 kHz to 500 kHz of the
oscillation frequency. However, the timing resistor
R
T
versus the oscillation frequency should be set
within the recommended range shown in figure 5.
Also, refer to the "Applications Notes, [1] Main
characteristics, Timing capacitance
Oscillation
frequency" for setting the timing capacitance.
For a high frequency use, the overshoot and un-
dershoot amounts increase due to operation delay
of the triangular oscillation comparator, and the
maximum duty ratio drops. This effect can be alle-
viated by speeding up through the reduction of the
resistor R
T
and increase in the circuit current.
Note that this IC can not be used as an IC for
slave when the several ICs are operated in parallel
synchronous mode.
[5] Time constant setting method for short-circuit protection circuit with joint-use of soft start/timer latch type
The constructional block diagram of protection latch circuit is shown in figure 6. The comparator for short-circuit
protection compares the output of error amplifier V
FB
with the reference voltage of 1.85 V at all the time.
When the load conditions of DC-DC converter output is stabilized, there is no fluctuation of error amplifier
output and the short-circuit protection comparator also keeps the balance. At this moment, the output transistor Q1 is
in the conductive state and the S.C.P. terminal is hold to approximately 1.25 V through the clamp circuit.
When the load conditions suddenly change, and high-level signal (1.85 V or higher) is input from the error amplifier
to the noninverted input of the short-circuit protection comparator, the short-circuit protection comparator outputs the
low-level signal. Since this signal cuts off the output transistor Q1, the S.C.P. terminal voltage V
PE
is released, and the
externally connected capacitor C
S
starts charging according to the following equation:
t
PE
[V]
C
S
t
PE
C
S
t
PE
[F]
0.58
V
PE
=
V
STBY
+
I
CHG
×
1.83 V
=
1.25 V
+
I
CHG
×
C
S
=
I
CHG
×
I
CHG
is the constant current determined by the oscillation timing resistor R
T
and its dispersion and fluctuation with
temperature are small. I
CHO
is expressed in the following equation:
I
CHG
=
V
RT
×
1
30
[A]
R
T
V
RT
is approximately 0.5 V and I
CHO
becomes approximately 1.1
μ
A when R
T
=
15 k
.
O
O
1 k
1 M
100 k
500 k
10 k
15 k
5 k 5.6 k
Timing resistance
R
T
(
)
10 k
Figure 5. Timing resistance recommended condition
Recommended operating
condition
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| 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 |
| 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) |
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