TL494_101 Datasheet, PDF (5/19 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

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TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
Electrical Characteristics
over recommended operating free-air temperature range, V_CC = 15 V, f = 10 kHz (unless otherwise noted)
Output Section
PARAMETER
Collector off-state current
Emitter off-state current
Collector-emitter saturation voltage
Common emitter
Emitter follower
Output control input current
TEST CONDITIONS
V_CE = 40 V, V_CC = 40 V
V_CC = V_C = 40 V, V_E = 0
V_E = 0, I_C = 200 mA
V_{O(C1 or C2)} = 15 V, I_E = –200 mA
V_I = V_ref
MIN
TYP ⁽¹⁾
2
1.1
1.5
(1) All typical values, except for temperature coefficient, are at T_A = 25°C.
MAX
100
–100
1.3
2.5
3.5
UNIT
µA
µA
V
mA
Dead-Time Control Section
See Figure 1
PARAMETER
Input bias current (DEAD-TIME CTRL)
Maximum duty cycle, each output
Input threshold voltage (DEAD-TIME CTRL)
TEST CONDITIONS
V_I = 0 to 5.25 V
V_I (DEAD-TIME CTRL) = 0, C_T = 0.01 µF,
R_T = 12 kΩ
Zero duty cycle
Maximum duty cycle
(1) All typical values, except for temperature coefficient, are at T_A = 25°C.
MIN TYP⁽¹⁾
–2
MAX
–10
45
3 3.3
0
UNIT
µA
%
V
PWM Comparator Section
See Figure 1
PARAMETER
Input threshold voltage (FEEDBACK)
Input sink current (FEEDBACK)
TEST CONDITIONS
Zero duty cyle
V (FEEDBACK) = 0.7 V
(1) All typical values, except for temperature coefficient, are at T_A = 25°C.
MIN TYP⁽¹⁾
4
0.3 0.7
MAX
4.5
UNIT
V
mA
Total Device
PARAMETER
Standby supply current
Average supply current
TEST CONDITIONS
R_T = V_ref,
All other inputs and outputs open
V_CC = 15 V
V_CC = 40 V
V_I (DEAD-TIME CTRL) = 2 V, See Figure 1
(1) All typical values, except for temperature coefficient, are at T_A = 25°C.
MIN TYP⁽¹⁾
6
9
7.5
MAX
10
15
UNIT
mA
mA
Switching Characteristics
T_A = 25°C
PARAMETER
Rise time
Fall time
Rise time
Fall time
TEST CONDITIONS
Common-emitter configuration, See Figure 3
Emitter-follower configuration, See Figure 4
MIN TYP⁽¹⁾
100
25
100
40
MAX
200
100
200
100
UNIT
ns
ns
ns
ns
(1) All typical values, except for temperature coefficient, are at T_A = 25°C.
5