TL598
PULSEWIDTHMODULATION CONTROL CIRCUITS
SLVS053D FEBRUARY 1988 REVISED NOVEMBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
INPUT/OUTPUT
CTRL
OUTPUT FUNCTION
VI = GND
Single-ended or parallel output
VI = REF
Normal push-pull operation
functional block diagram
GND
SIGNAL
REF
VCC
Reference
Regulator
Undervoltage
Lockout Control
2
GND
POWER
OUT2
OUT1
VC
Pulse-Steering
Flip-Flop
C1
1D
FEEDBACK
+
1IN+
DTC
CT
RT
PWM
Comparator
Error Amplifier
1
+
Error Amplifier
≈0.1 V
DTC
Comparator
Oscillator
OUTPUT CTRL
(see Function Table)
6
5
4
1
2
16
15
3
13
11
8
9
10
12
14
7
1IN
2IN+
2IN
0.7 mA
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1)
41 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amplifier input voltage, VI
VCC + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Collector voltage
41 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current (each output), sink or source, IO
250 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
θJA (see Notes 2 and 3): D package
73
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
67
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature, TJ
150
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. All voltage values, except differential voltages, are with respect to the signal ground terminal.
2. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.