TC962 TelCom Semiconductor, TC962 Datasheet

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TC962

Manufacturer Part Number
TC962
Description
HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
Manufacturer
TelCom Semiconductor
Datasheet

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HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
FEATURES
PIN CONFIGURATIONS (DIP and SOIC)
FUNCTIONAL BLOCK DIAGRAM
CATHODE
Pin Compatible With TC7662/ICL7662/SI7661
High Output Current ....................................... 80mA
No External Diodes Required
Wide Operating Range ............................. 3V to 18V
Low Output Impedance ............................. 28 Typ.
No Low Voltage Terminal Required
Application Zener On Chip
OSC Frequency Doubling Pin Option for Smaller
Output Capacitors
CATHODE
ZENER
TELCOM SEMICONDUCTOR, INC.
GND
ZENER
NC
NC
NC
NC
C
C
GND
+
C
C
+
2
3
4
5
6
7
8
1
16-Pin SOIC Wide
1
2
3
4
8-Pin CerDIP
FREQ X 2
TC962CPA
TC962EPA
TC962MJA
CATHODE
8-Pin DIP
OSC/C
TC962COE
TIMING
TC962IJA
ZENER
6
7
1
I
COMPARATOR
WITH HYSTERESIS
6.4V
+
8
7
6
5
I
16
15
14
13
12
11
10
C OSC
FREQ x 2
9
V DD
V OUT
C
F/F
Q
Q
V
NC
C OSC
NC
FREQ x 2
NC
V OUT
NC
V REF
DD
LEVEL
LEVEL
LEVEL
LEVEL
SHIFT
SHIFT
SHIFT
SHIFT
GENERAL DESCRIPTION
standard 7662 high-voltage DC-to-DC converter. Using
improved design techniques and CMOS construction, the
TC962 can source as much as 8mA versus the 7662’s
20mA capability.
as 18V and as low as 3V without the need for external
diodes. The output impedance of the device is a low 28
(with the proper capacitors), voltage conversion efficiency
is 99.9%, and power conversion efficiency is 97%.
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.
ORDERING INFORMATION
Part No.
TC962COE
TC962CPA
TC962EPA
TC962IJA
TC962MJA
TC7660EV
The TC962 is an advanced version of the industry-
As an inverter, the TC962 can put out voltages as high
The low voltage terminal (pin 6) required in some 7662
8
P SW1
N SW4
N SW2
N SW3
V DD
2
4
+
CAP
CAP
Package
16-Pin SOIC Wide
8-Pin Plastic DIP
8-Pin Plastic DIP
8-Pin CerDIP
8-Pin CerDIP
Evaluation Kit for Charge Pump Family
EVALUATION
C P
EXTERNAL
AVAILABLE
OUT
+
TC962
3
5
V
+
OUT
KIT
GND
C R
EXT
R L
– 55 C to +125 C
– 40 C to +85 C
– 25 C to +85 C
Temp. Range
0 C to +70 C
0 C to +70 C
TC962
TC962-8 9/16/96
4-37
1
2
3
4
5
6
7
8

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TC962 Summary of contents

Page 1

... CMOS construction, the TC962 can source as much as 8mA versus the 7662’s 20mA capability 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 (with the proper capacitors), voltage conversion efficiency is 99 ...

Page 2

... TC962 Pin 1, which is used as a test pin on the 7662 voltage reference zener on the TC962. This zener (6. mA) has a dynamic impedance of 12 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 applications section ...

Page 3

... DS (duty cycle) = 50%. . This as- IN Thus For the TC962 12,000 Hz, and a typical value of C would This is a reactive impedance of the ESR is as great the reactive value is not as critical as it would first appear, as the ESR would predominate. The 5 value is typical of a general-purpose electrolytic ...

Page 4

... TC962 OUT -TO-DC CONVERTER + Split V In Half TC962 OUT + Positive Voltage Multiplier TC962 TELCOM SEMICONDUCTOR, INC. ...

Page 5

... CAPACITANCE (pF) Current vs. Zener Voltage + 4.5 4.0 5.5 6.0 6.5 7.0 ZENER VOLTAGE (V) TC962 Frequency vs. Temperature –60 –40 – 100 120 140 TEMPERATURE ( C) Power Conversion Efficiency vs. I LOAD +25 C 150 100 135 90 EFFICIENCY ...

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