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TC38C43

更新时间： 2024-11-20 22:39:59
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TELCOM 控制器
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7页 86K
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BiCMOS CURRENT MODE PWM CONTROLLERS

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TC38C43 数据手册

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4
TC18C43  
TC28C43  
TC38C43  
BiCMOS CURRENT MODE PWM CONTROLLERS  
FEATURES  
GENERAL DESCRIPTION  
■ Low Power BiCMOS Design  
The TC38C43 is a current mode BiCMOS PWM control  
IC. With a low 1.0 mA supply current along with high drive  
current(0.7Apeak)itprovides alowcostsolutionforaPWM  
that operates to 500 kHz and directly drives MOSFETs up to  
HEX 3 size.  
Performance of the oscillator and current sense ampli-  
fier have been greatly improved over previous bipolar ver-  
sions. Voltage and temperature stability have been im-  
proved by a factor of 3. Noise immunity (PSRR) has also  
been improved.  
The TC38C43 is pin compatible with the earlier bipolar  
version so that designers can easily update older designs.  
Improvements have been added, though. For example,  
clock ramp reset current is specified at 2.5mA (±10%) for  
accurate dead time control. A few component values must  
bechanged(RT &CT)tousetheTC38C43inexistingbipolar  
designs.  
The 14-pin DIP and 16-pin SOIC versions have sepa-  
rate and internally isolated grounds, and are rated for higher  
output current (1.2A). These separate grounds allow for  
‘bootstrap’ operation of the PWM to further improve effi-  
ciency.  
■ Tough CMOSTM Construction  
■ Low Supply Current ............. 1.0mA Typ @ 100kHz  
■ Wide Supply Voltage Operation .............. 8V to 15V  
■ Latch-Up Immunity ................... 500mA on Outputs  
■ Input Will Withstand Negative Inputs to – 5 Volts  
■ High Output Drive .................................... 0.7A Peak  
(1.2A on 14-Pin and 16-Pin Versions)  
■ 2 kV ESD Protection  
■ Current Mode Control  
■ Fast Rise/Fall Time (Max)........... 60nsec @ 1000pF  
■ High Frequency Operation ..........................500kHz  
■ Clock Ramp Reset Current ................. 2.5mA ±10%  
■ Low Propagation Delay Current Amp  
to Output ............................................ 140nsec Typ.  
■ Pin Compatible with UC3843  
ORDERING INFORMATION  
Part No.  
Package  
Temperature  
TC18C43MJA  
TC18C43MJD  
8-Pin CerDIP  
14-Pin CerDIP  
– 55°C to +125°C  
– 55°C to +125°C  
TC28C43EOE  
TC28C43EPA  
TC28C43EPD  
16-Pin SOIC (Wide) – 40°C to +85°C  
FUNCTIONAL BLOCK DIAGRAM  
8-Pin Plastic DIP  
14-Pin Plastic DIP  
– 40°C to +85°C  
– 40°C to +85°C  
R
/C  
T
V
V
T
REF  
14  
IN  
12  
TC38C43COE  
TC38C43CPA  
TC38C43CPD  
16-Pin SOIC (Wide)  
8-Pin Plastic DIP  
14-Pin Plastic DIP  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
7
V
OSC  
CLK  
REF  
11  
10  
V
DD  
2.5V 1.4V  
PIN CONFIGURATIONS  
8-Pin Plastic DIP  
OUTPUT  
UV GOOD  
UNDER VOLTAGE  
SECTION  
16-Pin SOIC (Wide)  
ANALOG  
GND  
8
POWER  
9
GROUND  
8
7
6
5
CMPTR  
1
2
3
4
V
V
NC  
NC  
16  
15  
14  
13  
12  
11  
10  
9
1
2
3
4
5
6
7
8
NC  
V
REF  
IN  
V
FB  
REF  
TC18CMJA  
TC28CEPA  
TC38CCPA  
PWM COMPARATOR  
+
0.4V  
+
I
OUTPUT  
GND  
CMPTR  
V
V
SENSE  
/C  
SENSE  
IN  
–
5
S
Q
–
R
V
T
T
FB  
DD  
TC28CCOE  
TC38CEOE  
R
CLK  
I
OUTPUT  
GND  
SENSE  
/C  
R
T
T
ERROR AMP  
LIMIT BUFFER  
POWER  
GND  
NC  
NC  
14-Pin Plastic DIP  
2.5V  
2R  
1.4V  
+
–
+
–
NC  
V
FB  
3
CMPTR  
NC  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
V
REF  
COMP  
NC  
1
R
V
V
FB  
IN  
PIN NUMBERS FOR  
14-PIN DIP  
NC  
TC18CMJD  
TC28CEPD  
TC38CCPD  
V
DD  
I
OUTPUT  
GND  
SENSE  
NC  
POWER  
GND  
R
/C  
8
T
T
TC38C43-7 10/21/96  
TELCOM SEMICONDUCTOR, INC.  
4-93  
1234567

中文翻译

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