TC28C43EOE TELCOM [TelCom Semiconductor, Inc], TC28C43EOE Datasheet

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TC28C43EOE

Manufacturer Part Number
TC28C43EOE
Description
BiCMOS CURRENT MODE PWM CONTROLLERS
Manufacturer
TELCOM [TelCom Semiconductor, Inc]
Datasheet
1.TC28C43EOE.pdf (7 pages)
PIN CONFIGURATIONS
BiCMOS CURRENT MODE PWM CONTROLLERS
FEATURES
ORDERING INFORMATION
Part No.
TC18C43MJA
TC18C43MJD
TC28C43EOE
TC28C43EPA
TC28C43EPD
TC38C43COE
TC38C43CPA
TC38C43CPD
I SENSE
CMPTR
I SENSE
CMPTR
R T / C T
R T / C T
V FB
V FB
Low Power BiCMOS Design
Tough CMOS
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
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
NC
NC
NC
14-Pin Plastic DIP
TELCOM SEMICONDUCTOR, INC.
8-Pin Plastic DIP
1
2
3
4
1
2
3
4
5
6
7
TC18CMJA
TC28CEPA
TC38CCPA
TC18CMJD
TC28CEPD
TC38CCPD
TM
(1.2A on 14-Pin and 16-Pin Versions)
Package
8-Pin CerDIP
14-Pin CerDIP
16-Pin SOIC (Wide) – 40 C to +85 C
8-Pin Plastic DIP
14-Pin Plastic DIP
16-Pin SOIC (Wide)
8-Pin Plastic DIP
14-Pin Plastic DIP
14
13
12
11
10
Construction
8
7
6
5
9
8
V REF
V IN
OUTPUT
GND
V REF
NC
V IN
V DD
OUTPUT
GND
POWER
GND
I SENSE
CMPTR
R T / C T
V FB
NC
NC
NC
NC
16-Pin SOIC (Wide)
1
2
3
4
5
6
7
8
TC28CCOE
TC38CEOE
– 55 C to +125 C
– 55 C to +125 C
– 40 C to +85 C
– 40 C to +85 C
Temperature
0 C to +70 C
0 C to +70 C
0 C to +70 C
16
15
14
13
12
11
10
9
NC
V REF
V IN
V DD
OUTPUT
GND
POWER
GND
NC
GENERAL DESCRIPTION
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.
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.
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
designs.
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
ANALOG
SENSE
COMP
GND
The TC38C43 is a current mode BiCMOS PWM control
Performance of the oscillator and current sense ampli-
The 14-pin DIP and 16-pin SOIC versions have sepa-
V FB
The TC38C43 is pin compatible with the earlier bipolar
5
9
3
1
2.5V
–
0.4V
+
ERROR AMP
UNDER VOLTAGE
PWM COMPARATOR
+
–
+
–
T
& C
SECTION
CLK
V IN
12
T
) to use the TC38C43 in existing bipolar
2.5V 1.4V
2R
V REF
S
R
UV GOOD
Q
V REF
R
14
LIMIT BUFFER
+
–
R / T C T
OSC
7
1.4V
PIN NUMBERS FOR
14-PIN DIP
CLK
TC18C43
TC28C43
TC38C43
TC38C43-7 10/21/96
11
10
8
V DD
OUTPUT
POWER
GROUND
4-93
1
2
3
4
5
6
7
8

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TC28C43EOE Summary of contents

Page 1

... Low Propagation Delay Current Amp to Output ............................................ 140nsec Typ. Pin Compatible with UC3843 ORDERING INFORMATION Part No. Package TC18C43MJA 8-Pin CerDIP TC18C43MJD 14-Pin CerDIP TC28C43EOE 16-Pin SOIC (Wide) – +85 C TC28C43EPA 8-Pin Plastic DIP TC28C43EPD 14-Pin Plastic DIP TC38C43COE 16-Pin SOIC (Wide) TC38C43CPA 8-Pin Plastic DIP ...

Page 2

TC18C43 TC28C43 TC38C43 ABSOLUTE MAXIMUM RATINGS* Supply Voltage ............................................................18V Maximum Chip Temperature ................................... 150 C Storage Temperature ............................ – +150 C Lead Temperature (Soldering, 10 sec) ................. +300 C Package Thermal Resistance CerDip R ................................................ 150 C/W ...

Page 3

BiCMOS CURRENT MODE PWM CONTROLLERS ELECTRICAL CHARACTERISTICS (Cont): temperature range 15V Parameter Test Conditions Output Section R DS (ON 20mA SINK R DS (ON 20mA SOURCE Rise Time C ...

Page 4

TC18C43 TC28C43 TC38C43 PIN DESCRIPTION (Cont.) Pin No. Pin No Pin No 8-Pin 14-Pin 16-Pin POWER GROUND ANALOG GND ...

Page 5

BiCMOS CURRENT MODE PWM CONTROLLERS Dead Time The value of R has an effect on the discharge rate but T the primary consideration is the value of C required to discharge the capacitor is approximately 1000 UNDERVOLTAGE ...

Page 6

TC18C43 TC28C43 TC38C43 R T 10k Q1 2N2222 OR EQUIV 5k I RAMP 5k 10k C T TYPICAL CHARACTERISTICS Start Current vs. Temperature 150 START 145 140 135 MAX TYP 130 125 120 115 110 105 ...

Page 7

BiCMOS CURRENT MODE PWM CONTROLLERS TYPICAL CHARACTERISTICS (Cont vs. Temperature 2 15V f = 100kHz 1.8 1.6 1.4 1.2 1.0 –60 –40– 100 120 140 TEMPERATURE ( C) 1000 PDIP ...

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