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參數(shù)資料
| 型號： | TC28C43EPD |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | BiCMOS CURRENT MODE PWM CONTROLLERS |
| 中文描述： | 的BiCMOS電流模式PWM控制器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 83K |
| 代理商： | TC28C43EPD |
4-93
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
BiCMOS CURRENT MODE PWM CONTROLLERS
UNDER VOLTAGE
SECTION
VREF
OSC
12
9
5
3
1
2R
ERROR AMP
LIMIT BUFFER
+
R
CLK
PWM COMPARATOR
+
2.5V
1.4V
UV GOOD
14
VREF
7
R /CT
VDD
11
OUTPUT
10
PIN NUMBERS FOR
14-PIN DIP
COMP
VFB
2.5V
SENSE
ANAGND
VIN
CLK
0.4V
– +
–
+
–
S
R
POWER
GROUND
8
Q
1.4V
–
TC38C43-7 10/21/96
FEATURES
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Low Power BiCMOS Design
Tough CMOS
TM
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
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ORDERING INFORMATION
Part No.
Package
Temperature
– 55
°
C to +125
°
C
– 55
°
C to +125
°
C
TC18C43MJA
TC18C43MJD
8-Pin CerDIP
14-Pin CerDIP
TC28C43EOE
TC28C43EPA
TC28C43EPD
16-Pin SOIC (Wide)
8-Pin Plastic DIP
14-Pin Plastic DIP
– 40
°
C to +85
°
C
– 40
°
C to +85
°
C
– 40
°
C to +85
°
C
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
GENERAL DESCRIPTION
The TC38C43 is a current mode BiCMOS PWM control
IC. With a low 1.0 mA supply current along with high drive
current (0.7A peak) it provides a low cost solution for a PWM
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
be changed (R
T
& C
T
) to use the TC38C43 in existing bipolar
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.
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
8
7
6
5
VREF
CMPTR
OUTPUT
ISENSE
VIN
GND
RT/CT
VFB
TC18CMJA
NC
NC
NC
OUTPUT
POWER
GND
GND
NC
VREF
VIN
RT/CT
ISENSE
CMPTR
VDD
VFB
1
14
2
13
3
12
4
11
5
10
6
9
7
8
1
2
3
4
16
15
14
13
9
8
NC
NC
NC
NC
OUTPUT
POWER
NC
GND
VREF
VIN
CMPTR
VDD
VFB
TC18CMJD
12
11
10
5
6
7
NC
RT/CT
ISENSE
TC28CCOE
14-Pin Plastic DIP
16-Pin SOIC (Wide)
8-Pin Plastic DIP
PIN CONFIGURATIONS
TC18C43
TC28C43
TC38C43
相關PDF資料 |
PDF描述 |
|---|---|
| TC18C43MJD | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 05V; Output Voltage (Vdc): 15V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| TC18C43 | BiCMOS CURRENT MODE PWM CONTROLLERS |
| TC38C43COE | BiCMOS CURRENT MODE PWM CONTROLLERS |
| TC28C46 | CMOS CURRENT MODE PWM CONTROLLER |
| TC38C46 | CMOS CURRENT MODE PWM CONTROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TC28C46 | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C46EOE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C46EPE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C47 | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C47EOE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
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