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TelCom Semiconductor - HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER

Numéro de référence TC962COE
Description HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
Fabricant TelCom Semiconductor 
Logo TelCom Semiconductor 





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TC962COE fiche technique
EVALUATION
KIT
AVAILABLE
1
TC962
HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
FEATURES
s Pin Compatible With TC7662/ICL7662/SI7661
s High Output Current ....................................... 80mA
s No External Diodes Required
s Wide Operating Range ............................. 3V to 18V
s Low Output Impedance ............................. 28Typ.
s No Low Voltage Terminal Required
s Application Zener On Chip
s OSC Frequency Doubling Pin Option for Smaller
Output Capacitors
PIN CONFIGURATIONS (DIP and SOIC)
ZENER
CATHODE
C+
GND
C–
8-Pin DIP
8-Pin CerDIP
1
2
3
TC962CPA
TC962EPA
4 TC962IJA
TC962MJA
8
7
6
5
VDD
COSC
FREQ x 2
VOUT
ZENER
CATHODE
NC
C+
NC
GND
NC
C–
NC
16-Pin SOIC Wide
1
2
3
4
5
6
7
8
TC962COE
16
15
14
13
12
11
10
9
VDD
NC
COSC
NC
FREQ x 2
NC
VOUT
NC
FUNCTIONAL BLOCK DIAGRAM
FREQ X 2
OSC/C–
TIMING
6
7
II
Q
+ F/F
C
–Q
COMPARATOR
WITH HYSTERESIS
ZENER
CATHODE
1
6.4V
VREF
TELCOM SEMICONDUCTOR, INC.
GENERAL DESCRIPTION
The TC962 is an advanced version of the industry-
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 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
(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 7662
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
Package
Temp. Range
16-Pin SOIC Wide
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
8-Pin Plastic DIP
– 40°C to +85°C
8-Pin CerDIP
– 25°C to +85°C
8-Pin CerDIP
– 55°C to +125°C
Evaluation Kit for Charge Pump Family
LEVEL
SHIFT
LEVEL
SHIFT
8 VDD
TC962
P SW1
2 CAP+
N SW4 + CP
EXTERNAL
3 GND
LEVEL
SHIFT
LEVEL
SHIFT
N SW2
+
OUT
CR
EXT
4 CAP–
RL
N SW3
5
VOUT
TC962-8 9/16/96
4-37
2
3
4
5
6
7
8

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