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TC962
General Description
The TC962 is an advanced version of the industry
standard TC7662 high voltage DC-to-DC converter.
Using improved design techniques and CMOS
construction, the TC962 can source as much as 80mA
versus the 7662鈥檚 20mA capability.
As an inverter, the TC962 can put out voltages as high
as 18V and as low as 3V without the need for external
diodes. The output impedance of the device is a low
28鈩?(with the proper capacitors), voltage conversion
efficiency is 99.9%, and power conversion efficiency is
97%.
The low voltage terminal (pin 6) required in some
TC7662 applications has been eliminated. Grounding
this terminal will double the oscillator frequency from
12kHz to 24kHz. This will allow the use of smaller
capacitors for the same output current and ripple, in
most applications. Only two external capacitors are
required for inverter applications. In the event an
external clock is needed to drive the TC962 (such as
paralleling), driving this pin directly will cause the
internal oscillator to sync to the external clock.
Pin 1, which is used as a test pin on the 7662, is a
voltage reference zener on the TC962. This zener
(6.4V at 5mA) has a dynamic impedance of 12鈩?and is
intended for use where the TC962 is supplying current
to external regulator circuitry and a reference is needed
for the regulator circuit. (See
Section 3.0 Applications
Information).
The TC962 is compatible with the LTC1044, SI7661
and ICL7662. It should be used in designs that require
greater power and/or less input to output voltage drop.
It offers superior performance over the ICL7660S.
High Current Charge Pump DC-to-DC Converter
Pin Compatible With TC7662/ICL7662/SI7661
High Output Current 80mA
No External Diodes Required
Wide Operating Range 3V to 18V
Low Output Impedance 28鈩?Typ.
No Low Voltage Terminal Required
Application Zener On-Chip
OSC Frequency Doubling Pin Option for Smaller
Output Capacitors
Applications
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Laptop Computers
Disk Drives
Process Instrumentation
碌P-Based
Controllers
Device Selection Table
Part
Number
TC962COE
TC962CPA
TC962EPA
TC962IJA
TC962MJA
Package
16-Pin SOIC Wide
8-Pin Plastic DIP
8-Pin Plastic DIP
8-Pin CERDIP
8-Pin CERDIP
Operating
Temp.
Range
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-25擄C to +85擄C
-55擄C to +125擄C
Package Type
16-Pin SOIC Wide
8-Pin DIP
8-Pin CERDIP
Zener
8 V
DD
Cathode 1 鈥?/div>
C+ 2
TC962CPA
7 C
OSC
6 FREQ x 2
GND 3
TC962IJA
C鈥?4
TC962MJA
5 V
OUT
Zener
Cathode 1
NC 2
C+ 3
NC 4
GND 5
NC 6
C鈥?7
NC 8
16 V
DD
15 NC
14 C
OSC
13 NC
TC962EPA
TC962COE
12 FREQ x 2
11 NC
10 V
OUT
9 NC
錚?/div>
2002 Microchip Technology Inc.
DS21484B-page 1
TC962相關(guān)型號PDF文件下載
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