參數(shù)資料
型號: AIC1650CN
廠商: Analog Integrations Corporation
英文描述: 3-Cell, High-Efficiency, Inverting DC/DC Converter
中文描述: 3節(jié)電池,高效率,反向直流/直流轉(zhuǎn)換器
文件頁數(shù): 4/6頁
文件大?。?/td> 206K
代理商: AIC1650CN
AIC1650
4
PIN DESCRIPTIONS
PIN 1: VIN
- 4V to 20V input supply voltage.
PIN 2: VREF- 1.22V reference output. Bypass
with a 0.047
μ
F capacitor to GND.
Sourcing capability is guaran-
teed to be greater than 250
μ
A.
PIN 3: SHDN- Logic input to shutdown the chip.
>1.5V = normal operation,
GND = shutdown
In shutdown mode DLOW and
DHI pins are at high level.
PIN 4: FB
- Feedback signal input to sense
ground. Connecting a resistor
R1 to V
OUT
and a resistor R2 to
V
REF
pin yields the output volt-
age:
V
OUT
= -(R1/R2 ) x V
REF
PIN 5: GND - Power ground.
PIN 6: DLOW - Driver sinking output. Connected
to DHI when using an external
P-channel MOSFET. When us-
ing an external PNP bipolar
transistor, connect a resistor RB
from this pin to DHI. RB value
depends on V
IN
, inductor and
PNP bipolar transistor. By ad-
justing the RB value, efficiency
can be optimized.
PIN 7: DHI
- Driver sourcing output. Connect
to gate of the external P-channel
MOSFET or base of the PNP bi-
polar transistor.
PIN 8: CL
- Current-limit input. This pin
clamps the switch peak current
to prevent over-current damage
to the external switch.
APPLICATION INFORMATIONS
4
6
8
10
12
14
16
18
20
V
IN
(V)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Max. Output Power vs V
IN
M
Typical Application Circuit
Inductor Value
100
μ
H
270
μ
H
120
μ
H
150
μ
H
180
μ
H
220
μ
H
300
μ
H
330
μ
H
The typical application circuit generates an adjustable
negative voltage for contrast bias of LCD displays.
Efficiency and output power can be optimized by us-
ing appropriate inductor and switch. The following
formulas provide a guideline for determining the op-
timal component values:
L
=
(11.1
0.15
V )
IN
V
×
I
V
IN
OUT
OUT
×
×
PNP :
V
V
V
CEO
IN
OUT
I
V
>
+
I
200
C,MAX
OUT
IN
×
V
0.4V at I
= 200
I
V
CE
C
OUT
IN
<
×
and
10
β
=
RB
where, units: V
IN
& V
OUT
in V, I
OUT
in A, L in
μ
H,
RB in
3 x L x (V
IN
- 0.8)
相關(guān)PDF資料
PDF描述
AIC1652 CMOS Hex Non-Inverting Buffer/Converter 16-SOIC -55 to 125
AIC1652CN MICROPOWER INVERTING DC/DC CONVERTER
AIC1652CS MICROPOWER INVERTING DC/DC CONVERTER
AIC1653 Micropower Inverting DC/DC Converter in SOT-23-5
AIC1653CVBG Micropower Inverting DC/DC Converter in SOT-23-5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AIC1650CS 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:3-Cell, High-Efficiency, Inverting DC/DC Converter
AIC1652 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:MICROPOWER INVERTING DC/DC CONVERTER
AIC1652CN 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:MICROPOWER INVERTING DC/DC CONVERTER
AIC1652CS 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:MICROPOWER INVERTING DC/DC CONVERTER
AIC1652GSTR 制造商: 功能描述:MICRO-POWER INVERTING PFM DC-DC IC 制造商:undefined 功能描述:MICRO-POWER INVERTING PFM DC-DC IC