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PDF TC962CPA Data sheet ( Hoja de datos )

Número de pieza TC962CPA
Descripción HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
Fabricantes TelCom Semiconductor 
Logotipo TelCom Semiconductor Logotipo



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No Preview Available ! TC962CPA Hoja de datos, Descripción, Manual

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

1 page




TC962CPA pdf
HIGH CURRENT CHARGE PUMP
DC -TO-DC CONVERTER
1
TC962
TYPICAL CHARACTERISTICS
Supply Current vs. Temperature
700
600
500
400 V + = 15V
300
200
V + = 15V
100
0
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Oscillator Frequency vs. CEXT
TA = +25°C
10k
1k
100
10
1
10 100 1000
CAPACITANCE (pF)
10,000
Frequency vs. Temperature
20
18
16
14
12
10
8
6
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Output Resistance vs. Temperature
80
70
60
50 V+ = 5V IL = 3mA
40
30 V+ = 15V IL = 20mA
20
10
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Current vs. Zener Voltage
50 TA = +25°C
40
30
20
10
0
4.5 4.0 5.5 6.0 6.5 7.0
ZENER VOLTAGE (V)
Power Conversion Efficiency vs. I LOAD
100
TA = +25°C
150
90
EFFICIENCY
80
70
135
120
105
60
SUPPLY
90
CURRENT
50 75
40 60
30 45
20 30
10 15
00
8 16 24 32 40 48 56 64 72 80
LOAD CURRENT (mA)
Output Resistance vs. Input Voltage
110
100 TA = +25°C
90
80
70
60 3mA
20mA
50
40
30
20
10
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
2
3
4
5
6
7
8
TELCOM SEMICONDUCTOR, INC.
4-41

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