CMOS CURRENT MODE
PWM CONTROLLERS
TC18C46
TC28C46
TC38C46
ELECTRICAL CHARACTERISTICS
(Cont):
Unless otherwise stated, these specifications apply for
T
A
= –55°C to +125°C for TC18C46; – 40°C to +85°C for the TC28C46; and 0°C to +70°C for the TC38C46; V
IN
= V
DD
=
16V; R
T
= 30.1k; C
T
= 270pF.
TC18C46
TC28C46
Parameter
Current Sense Section
Amplifier Gain
Max Differential
Input Signal (V
Pin 4
-V
Pin 3
)
Input Offset Voltage
CMRR
PSRR
Input Bias Current
Input Offset Current
Input Common Mode Range
Delay to Outputs
(Notes 2, 3)
(Note 2)
(Note 2)
V
CM
= 1V to 12V, (Note 2)
V
IN
= 8V to 16V, (Note 2)
(Note 1)
(Note 1)
(Note 1)
T
f
= 25°C, (Note 1)
—
(Shutdown Unlatched)
2.7
1.1
0.4
40
40
—
—
0
150
±1
3
320
0
140
—
100
125
3
1.5
0.65
60
60
±1
±0.1
—
225
±25
3.5
360
—
—
—
50
250
3.6
1.8
0.85
—
—
±100
±2
11
400
—
4
400
V
IN
—
60
—
400
2.7
1.1
0.4
40
40
—
—
0
150
±1
3
320
0
140
—
100
125
3
1.5
0.65
60
60
±1
±0.1
—
225
±25
3.5
360
—
—
—
50
250
3.4
1.8
0.85
—
—
±100
±2
11
400
mV
4
400
V
IN
—
65
—
400
V/V
V
V
dB
dB
nA
nA
V
nsec
TC38C46
Max
Min
Typ
Max
Units
Test Conditions
Min
Typ
Current Limit Adjust Section
Current Limit Voltage Offset
Input Impedance
kΩ
mV
V
µA
µA
nsec
nsec
Ω
Ω
nsec
nsec
V
V
V
mA
µA
Shutdown Terminal Section
Threshold Voltage
Input Voltage Range
Min Latching
Current (I
Pin 1
)
Max Non-Latching
Current (I
Pin1
)
Min Pulse Width
Delay to Outputs
(Note 1)
(Note 4)
(Note 5)
(Note 1)
(Note 1)
Output Section
Output Low Level r
DS (ON)
Output High Level r
DS (ON)
Output Rise Time
Output Fall Time
I
SINK
= 20mA
I
SOURCE
= 20mA
C
L
= 1
µF
C
L
= 1
µF
—
—
—
—
6.5
7.4
0.6
—
—
10
20
55
55
7
7.8
0.8
1.2
250
20
35
90
90
7.3
8
1
2.5
350
—
—
—
—
6.5
7.4
0.6
—
—
10
20
55
55
7
7.8
0.8
1.2
250
20
35
90
90
7.3
8
1
2
350
Undervoltage Lockout Section
Undervoltage Threshold
Start Threshold
Threshold Hysteresis
Total Standby Current
Supply Current
Start-Up Current
NOTES:
1. These parameters, although guaranteed over the
recommended operating conditions, are not tested in
production.
2. Parameter measured at trip point of latch with V
Pin 6
=
V
REF
, V
Pin 16
= 0V.
3. Amplifier gain is defined as:
4-104
G =
∆VPin
7 ;∆VPin 4 = 0V to 1V
∆VPin
4
4. Current into Pin 1 guaranteed to latch circuit in shutdown
state.
5. Current into Pin 1 guaranteed not to latch circuit in
shutdown state.
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
