AIC1650 AIC [Analog Intergrations Corporation], AIC1650 Datasheet

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AIC1650

Manufacturer Part Number
AIC1650
Description
3-Cell, High-Efficiency, Inverting DC/DC Converter
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet
Analog Integrations Corporation
DS-1650-02 Dec 27, 00
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
100µF
4V to 20V Input Voltage Operation.
Adjustable Output Voltage up to -40V.
Low Quiescent Current at 100µA.
Pulse Frequency Modulation Maintains High
Efficiency (max. 90%).
100KHz to 320KHz Switching Frequency.
Power-Saving Shutdown Mode (8µA Typical).
High Efficiency with Low Cost External PNP
Bipolar Transistor.
Negative LCD Contrast Bias for
1. Notebook & Palmtop Computers.
2. Pen-Based Data System.
3. Portable Data Collection Terminals.
4. Personal Digital Assistants.
Negative Voltage Supply.
0.047µF
C1
5V
C4
+
Negative LCD Contrast Bias Power Supply
100K
R2
VIN
VREF
SHDN
FB
AIC1650
DLOW
1M
R1
GND
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
DHI
CL
10nF
C3
1.5K~12K
RB
*
3-Cell, High-Efficiency, Inverting DC/DC
Sumida CD-54 SERIES
V
OUT
Q1
2N2907A
150µH
*L
= -1.22V x R1/R2
FAX: 886-3-5772510
D1
1N5819
+4V ~ 20V
V
IN
+
C2
DESCRIPTION
The AIC1650 is a high performance inverting
DC/DC converter, designed to drive an external
power switch to generate programmable nega-
tive voltages. In the particularly suitable LCD
bias contrast application, maximum efficiency of
90% can be achieved with low cost PNP bipolar
transistor drivers. 4V to 20V input operation
range allows the AIC1650 to be powered di-
rectly by the battery pack in most battery-
operated applications for greater efficiency.
Output voltage can be scaled to -40V or greater
by two external resistors. A pulse frequency
modulation scheme is employed to maintain
high efficiency conversion under wide input
voltage range. Quiescent current is
100µA and can be reduced to 8µA in shutdown
mode.
100KHz to 320KHz range, small size switching
components are ideal for battery powered port-
able equipments, like notebook and palmtop
computers.
V
-12V~ -40V
OUT
Switching
frequency
Converter
www.analog.com.tw
AIC1650
being
around
about
1

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AIC1650 Summary of contents

Page 1

... PNP bipolar transistor drivers 20V input operation range allows the AIC1650 to be powered di- rectly by the battery pack in most battery- operated applications for greater efficiency. Output voltage can be scaled to -40V or greater by two external resistors ...

Page 2

... ORDERING INFORMATION AIC1650 XX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C=0°C~+70°C ABSOLUTE MAXIMUM RATINGS Supply Voltage ..................... .............................................…………….................................... SHDN Voltage Operating Temperature Range Storage Temperature Range TEST CIRCUIT Refer to Typical Application Circuit. ELECTRICAL CHARACTERISTICS fied.) PARAMETER ...

Page 3

... Ta=25° CURRENT LIMIT COMPARATOR PFM LATCH OSCILLATOR 1.22V REFERENCE VOLTAGE + - ERROR COMPARATOR AIC1650 (Ta=25° ° ° ° C) Shutdown Current (V) IN Frequency vs V Voltage IN Ta=0°C Ta=25°C Ta=70° (V) ...

Page 4

... CEO IN OUT I OUT ≥ × I 200 C,MAX V IN < 200 CE C β = and 10 ≅ 0. µH, & OUT OUT RB in Ω AIC1650 , inductor and This pin IN × V OUT I OUT × ...

Page 5

... L=220µH L=150µ (V) IN Efficiency =-22V OUT I =-10mA L=300µH OUT L=150µ (V) IN Efficiency -30V OUT I = -10mA L=300µH OUT L=150µ (V) IN AIC1650 ...

Page 6

... PHYSICAL DIMENSIONS 8 LEAD PLASTIC SO (unit: mm LEAD PLASTIC DIP (unit: mm SYMBOL AIC1650 SYMBOL MIN A 1.35 A1 0.10 B 0.33 C 0.19 D 4.80 E 3.80 e 1.27(TYP) H 5.80 L 0.40 MIN MAX A1 0.381 — A2 2.92 4.96 b 0.35 0.56 C 0.20 0.36 D 9.01 10.16 E 7.62 8.26 E1 6.09 7.12 e 2.54 (TYP) eB — 10.92 L 2.92 3.81 MAX 1.75 0.25 0.51 0.25 5.00 4.00 6.20 1.27 6 ...

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