CMOS CURRENT MODE
PWM CONTROLLERS
TC18C46
TC28C46
TC38C46
ABSOLUTE MAXIMUM RATINGS
Lead Temperature (Soldering, 10 sec) ................... 300°C
Package Thermal Resistance
Output Current, Source or Sink (Pins 1, 14) ..........500mA
Analog Inputs (Pins 3, 4, 5, 6, 16).............. – 0.3V to +VIN
Reference Output Current (Pin 2) ........................– 30 mA
Sync Output Current (Pin 10)..................................– 5mA
Error Amplifier Output Current (Pin 7).....................– 5mA
Soft Start Sink Current (Pin 1)..................................50mA
Oscillator Charging Current (Pin 9) ............................5mA
Supply Voltage ............................................................18V
Maximum Chip Temperature................................... 150°C
Storage Temperature ............................ – 65°C to +150°C
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
NOTES:
1. AllvoltagesarewithrespecttoGround, Pin12. Currentsarepositiveinto,
negative out of the specified terminal.
2. Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
PIN CONFIGURATIONS
16-Pin Plastic DIP (Narrow)
16-Pin CerDIP
16-Pin SOIC (Wide)
CURRENT LIMIT/
CURRENT LIMIT/
SHDN
SHDN
1
2
3
4
5
6
7
8
16
15
14
13
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SOFT START
SOFT START
V
V
V
V
IN
IN
REF
REF
OUTPUT B
– CURRENT SENSE
+ CURRENT SENSE
+ ERROR AMP
– ERROR AMP
COMP
OUTPUT B
– CURRENT SENSE
+ CURRENT SENSE
+ ERROR AMP
– ERROR AMP
COMP
TC18C46MJE
TC28C46EPE
TC38C46CPE
TC28C46EOE
TC38C46COE
V
V
DD
DD
GND
12 GND
OUTPUT A
SYNC
11 OUTPUT A
10 SYNC
R
T
C
T
9
R
T
C
T
4-102
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
