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TC38C43 Datasheet Preview

TC38C43 Datasheet

BiCMOS CURRENT MODE PWM CONTROLLERS

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TC38C43 pdf
1TC18C43
TC28C43
TC38C43
BiCMOS CURRENT MODE PWM CONTROLLERS
FEATURES
GENERAL DESCRIPTION
2
s Low Power BiCMOS Design
s Tough CMOSTM Construction
s Low Supply Current ............. 1.0mA Typ @ 100kHz
s Wide Supply Voltage Operation .............. 8V to 15V
s Latch-Up Immunity ................... 500mA on Outputs
s Input Will Withstand Negative Inputs to – 5 Volts
s High Output Drive .................................... 0.7A Peak
(1.2A on 14-Pin and 16-Pin Versions)
s 2 kV ESD Protection
s Current Mode Control
s Fast Rise/Fall Time (Max) ........... 60nsec @ 1000pF
s High Frequency Operation ..........................500kHz
s Clock Ramp Reset Current ................. 2.5mA ±10%
s Low Propagation Delay Current Amp
to Output ............................................ 140nsec Typ.
s Pin Compatible with UC3843
ORDERING INFORMATION
Part No.
TC18C43MJA
TC18C43MJD
TC28C43EOE
TC28C43EPA
TC28C43EPD
Package
Temperature
8-Pin CerDIP
14-Pin CerDIP
– 55°C to +125°C
– 55°C to +125°C
16-Pin SOIC (Wide) – 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
14-Pin Plastic DIP – 40°C to +85°C
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 (RT & CT) 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
3
4
5
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
PIN CONFIGURATIONS
8-Pin Plastic DIP
16-Pin SOIC (Wide)
CMPTR 1
VFB
ISENSE
RT / CT
2
3
4
TC18CMJA
TC28CEPA
TC38CCPA
8 VREF
7 VIN
6 OUTPUT
5 GND
14-Pin Plastic DIP
CMPTR 1
NC 2
14 VREF
13 NC
NC
NC
CMPTR
VFB
ISENSE
RT / CT
NC
NC
VFB 3
NC 4
ISENSE 5
NC 6
RT / CT 7
TC18CMJD
TC28CEPD
TC38CCPD
12 VIN
11 VDD
10 OUTPUT
9 GND
8 POWER
GND
1
2
3
4
5
6
7
8
TC28CCOE
TC38CEOE
16 NC
15 VREF
14 VIN
13 VDD
12 OUTPUT
11 GND
10 POWER
GND
9 NC
ANALOG
GND 9
VIN
12
VREF
VREF
14
RT/CT
7
OSC
2.5V 1.4V
UNDER VOLTAGE UV GOOD
SECTION
CLK
11 VDD
10 OUTPUT
8 POWER
GROUND
0.4V
SENSE
5
+
PWM COMPARATOR
+
SQ
CLK
R
ERROR AMP
2.5V +
VFB 3
COMP
1
2R
LIMIT BUFFER
+ 1.4V
R
PIN NUMBERS FOR
14-PIN DIP
6
7
8
TELCOM SEMICONDUCTOR, INC.
TC38C43-7 10/21/96
4-93
Free Datasheet http://www.datasheet4u.com/



TelCom
TelCom

TC38C43 Datasheet Preview

TC38C43 Datasheet

BiCMOS CURRENT MODE PWM CONTROLLERS

No Preview Available !

TC38C43 pdf
TC18C43
TC28C43
TC38C43
BiCMOS CURRENT MODE
PWM CONTROLLERS
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ............................................................18V
Maximum Chip Temperature ................................... 150°C
Storage Temperature ............................ – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
Package Thermal Resistance
CerDip RθJ-A ................................................ 150°C/W
CerDip RθJ-C .................................................. 55°C/W
PDIP RθJ-A ................................................... 125°C/W
PDIP RθJ-C ..................................................... 45°C/W
SOIC RθJ-A ................................................... 250°C/W
SOIC RθJ-C ..................................................... 75°C/W
Operating Temperature
18C4x ...................................... – 55C° ≤ TA +125°C
28C4x ........................................ – 40C° ≤ TA +85°C
38C4x ............................................. 0C° ≤ TA +70°C
ELECTRICAL CHARACTERISTICS unless otherwise stated, these specifications apply over specific
temperature range. VIN = VDD = 15V; RT = 71 k; CT = 150 pF.
TC18C43
TC28C43
TC38C43
Parameter
Test Conditions
Min Typ Max Min Typ Max Units
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temp Stability
TA = 25°C, IO = 1mA
9.5V VIN 15V, IO = 1mA
1mA lO 11mA
(Note 1)
Output Noise Voltage
Long Term Stability
Output Short Circuit
10Hz f 10 kHz,TA = 25°C (Note 1)
TA = 125°C, 1000 Hrs. (Note 1)
Oscillator Section
Initial Accuracy
Voltage Stability
Temp Stability
Clock Ramp Reset
Amplitude
Maximum Freq
TA = 25°C (Note 4)
9.5V VIN 15V
TMIN TA TMAX (Note 1); Figure 2
RT/CT Pin at 4V
RT/CT Pin Peak to Peak
Note 1
Error Amp Section
Input Offset Voltage
Input Bias Current
V(CMPTR) = 2.5V
(Note 1)
AVOL
2V VO 4V
Gain Bandwidth Product (Note 1)
PSRR
Output Sink Current
Output Source Current
VOUT High
VOUT Low
Rise Response
9.5V VIN 15V
VFB = 2.7V, V(CMPTR) = 1.1V (Note 1)
VFB = 2.3V, V(CMPTR) = 5V (Note 1)
VFB = 2.3V, RL = 10k to Ground
VFB = 2.7V, RL = 10k to VREF
Note 1
Fall Response
Note 1
Current Sense Section
Gain Ratio
Notes 2 & 3
Maximum Input Signal
PSRR
Input Bias Current
V(CMPTR) = 5V (Note 2)
9.5V VIN 15V (Notes 1, 2 & 5)
Note 1
Delay to Output
V(ISENSE) = 1V (Note 1); Figure 3
4.9 5
5.1
±3 ±10
±5 ±15
±0.25 ±0.5
— 100 —
±0.5 —
-20 -50 -100
4.90 5
±3
±3
±0.25
— 100
±0.5
-30 -50
5.10
±10
±10
±0.5
-100
V
mV
mV
mV/°C
µV(rms)
%
mA
90 100 110 93.8 100 106.5
±0.2 ±0.3 — ±0.2 ±0.3
±0.01 ±0.05 — ±0.01 ±0.03
2.25 2.5 2.75 2.25 2.5 2.75
2.45 2.65 2.85 2.45 2.65 2.85
1—— 1 — —
kHz
%
%/°C
mA
V
MHz
±15 ±50 — ±15 ±50
mV
±0.3 ±2
±0.3 ±2
nA
70 90 — 70 90
dB
650 750 — 650 750
kHz
80 100 —
80 100
dB
1.2 1.5 — 1.5 1.7
mA
3 3.4 — 3.9 4.2 — mA
5.65 6 6.5 5.65 6 6.5 V
0.1 0.7 1.1 0.1 0.7 1.1
V
— 57 —5
7 µsec
— 35 —3
5 µsec
2.8 2.9 3.1 2.8 2.9 3.1 V/V
0.85 0.95 1.05 0.85 0.95 1.05
V
70 80 — 70 80 — dB
±0.3 ±2
±0.3 ±2
nA
— 140 160 — 140 150 nsec
4-94
TELCOM SEMICONDUCTOR, INC.
Free Datasheet http://www.datasheet4u.com/


Part Number TC38C43
Description BiCMOS CURRENT MODE PWM CONTROLLERS
Maker TelCom
Total Page 7 Pages
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