CMOS CURRENT MODE
PWM CONTROLLERS
TC18C46
TC28C46
TC38C46
ABSOLUTE MAXIMUM RATINGS
Output Current, Source or Sink (Pins 1, 14) ..........500mA
Analog Inputs (Pins 3, 4, 5, 6, 16) .............. – 0.3V to +V
IN
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
Lead Temperature (Soldering, 10 sec) ................... 300°C
Package Thermal Resistance
CerDIP R
θJ-A
.................................................................
150°C/W
CerDIP R
θJ-C
...................................................................
55°C/W
PDIP R
θJ-A
.....................................................................
125°C/W
PDIP R
θJ-C
........................................................................
45°C/W
SOIC R
θJ-A
.....................................................................
250°C/W
SOIC R
θJ-C
.......................................................................
75°C/W
NOTES:
1. All voltages are with respect to Ground, Pin 12. Currents are positive into,
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
CURRENT LIMIT/
SOFT START
VREF
– CURRENT SENSE
+ CURRENT SENSE
+ ERROR AMP
– ERROR AMP
COMP
CT
1
2
3
4
5
6
7
8
TC18C46MJE
TC28C46EPE
TC38C46CPE
16
15
14
13
12
11
10
9
SHDN
VIN
OUTPUT B
VDD
GND
OUTPUT A
SYNC
RT
CURRENT LIMIT/
SOFT START
VREF
– CURRENT SENSE
+ CURRENT SENSE
+ ERROR AMP
– ERROR AMP
COMP
CT
16-Pin SOIC (Wide)
1
2
3
4
5
6
7
8
TC28C46EOE
TC38C46COE
16
15
14
13
12
11
10
9
SHDN
VIN
OUTPUT B
VDD
GND
OUTPUT A
SYNC
RT
4-102
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
