OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

TL494BDR2

P1-P3P4-P6P7-P9P10-P12P13-P14
© Semiconductor Components Industries, LLC, 2005
June, 2005 − Rev. 6
1 Publication Order Number:
TL494/D
TL494, NCV494
SWITCHMODE™ Pulse Width
Modulation Control Circuit
The TL494 is a fixed frequency, pulse width modulation control
circuit designed primarily for SWITCHMODE power supply control.
Features
• Complete Pulse Width Modulation Control Circuitry
• On−Chip Oscillator with Master or Slave Operation
• On−Chip Error Amplifiers
• On−Chip 5.0 V Reference
• Adjustable Deadtime Control
• Uncommitted Output Transistors Rated to 500 mA Source or Sink
• Output Control for Push−Pull or Single−Ended Operation
• Undervoltage Lockout
• NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
• Pb−Free Packages are Available*
MAXIMUM RATINGS (Full operating ambient temperature range applies,
unless otherwise noted.)
Rating
Symbol Value Unit
Power Supply Voltage V
CC
42 V
Collector Output Voltage V
C1
,
V
C2
42 V
Collector Output Current
(Each transistor) (Note 1)
I
C1
, I
C2
500 mA
Amplifier Input Voltage Range V
IR
−0.3 to +42 V
Power Dissipation @ T
A
≤ 45°C P
D
1000 mW
Thermal Resistance, Junction−to−Ambient
R
q
JA
80 °C/W
Operating Junction Temperature T
J
125 °C
Storage Temperature Range T
stg
−55 to +125 °C
Operating Ambient Temperature Range
TL494B
TL494C
TL494I
NCV494B
T
A
−40 to +125
0 to +70
−40 to +85
−40 to +125
°C
Derating Ambient Temperature T
A
45 °C
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. Maximum thermal limits must be observed.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAMS
SOIC−16
D SUFFIX
CASE 751B
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
TL494xDG
AWLYWW
x = B, C or I
A = Assembly Location
WL = Wafer Lot
YY, Y = Year
WW, W = Work Week
G = Pb−Free Package
1
16
PDIP−16
N SUFFIX
CASE 648
*This marking diagram also applies to NCV494
.
PIN CONNECTIONS
C
T
R
T
Ground
C1
1
Inv
Input
C2
Q2
E2
E1
1
≈ 0.1 V
Oscillator
V
CC
5.0 V
REF
(Top View)
Noninv
Input
Inv
Input
V
ref
Output
Contro
l
V
CC
Noninv
Input
Compen/PWN
Comp Input
Deadtime
Control
Error
Amp
+
−
2
3
4
5
6
7
89
10
11
12
13
14
15
16
2
Error
Amp
+
−
Q1
TL494xN
AWLYYWWG
*
1
16
TL494, NCV494
http://onsemi.com
2
RECOMMENDED OPERATING CONDITIONS
Characteristics Symbol Min Typ Max Unit
Power Supply Voltage V
CC
7.0 15 40 V
Collector Output Voltage V
C1
, V
C2
− 30 40 V
Collector Output Current (Each transistor) I
C1
, I
C2
− − 200 mA
Amplified Input Voltage V
in
−0.3 − V
CC
− 2.0 V
Current Into Feedback Terminal l
fb
− − 0.3 mA
Reference Output Current l
ref
− − 10 mA
Timing Resistor R
T
1.8 30 500
kW
Timing Capacitor C
T
0.0047 0.001 10
mF
Oscillator Frequency f
osc
1.0 40 200 kHz
ELECTRICAL CHARACTERISTICS (V
CC
= 15 V, C
T
= 0.01 mF, R
T
= 12 kW, unless otherwise noted.)
For typical values T
A
= 25°C, for min/max values T
A
is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics Symbol Min Typ Max Unit
REFERENCE SECTION
Reference Voltage (I
O
= 1.0 mA) V
ref
4.75 5.0 5.25 V
Line Regulation (V
CC
= 7.0 V to 40 V) Reg
line
− 2.0 25 mV
Load Regulation (I
O
= 1.0 mA to 10 mA) Reg
load
− 3.0 15 mV
Short Circuit Output Current (V
ref
= 0 V) I
SC
15 35 75 mA
OUTPUT SECTION
Collector Off−State Current
(V
CC
= 40 V, V
CE
= 40 V)
I
C(off)
− 2.0 100
mA
Emitter Off−State Current
V
CC
= 40 V, V
C
= 40 V, V
E
= 0 V)
I
E(off)
− − −100
mA
Collector−Emitter Saturation Voltage (Note 2)
Common−Emitter (V
E
= 0 V, I
C
= 200 mA)
Emitter−Follower (V
C
= 15 V, I
E
= −200 mA)
V
sat(C)
V
sat(E)
−
−
1.1
1.5
1.3
2.5
V
Output Control Pin Current
Low State (V
OC
v 0.4 V)
High State (V
OC
= V
ref
)
I
OCL
I
OCH
−
−
10
0.2
−
3.5
mA
mA
Output Voltage Rise Time
Common−Emitter (See Figure 12)
Emitter−Follower (See Figure 13)
t
r
−
−
100
100
200
200
ns
Output Voltage Fall Time
Common−Emitter (See Figure 12)
Emitter−Follower (See Figure 13)
t
f
−
−
25
40
100
100
ns
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
TL494, NCV494
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (V
CC
= 15 V, C
T
= 0.01 mF, R
T
= 12 kW, unless otherwise noted.)
For typical values T
A
= 25°C, for min/max values T
A
is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics
Symbol Min Typ Max Unit
ERROR AMPLIFIER SECTION
Input Offset Voltage (V
O
(Pin
3)
= 2.5 V) V
IO
− 2.0 10 mV
Input Offset Current (V
O
(Pin
3)
= 2.5 V) I
IO
− 5.0 250 nA
Input Bias Current (V
O
(Pin
3)
= 2.5 V) I
IB
− −0.1 −1.0
mA
Input Common Mode Voltage Range (V
CC
= 40 V, T
A
= 25°C) V
ICR
−0.3 to V
CC
−2.0 V
Open Loop Voltage Gain (DV
O
= 3.0 V, V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW)
A
VOL
70 95 − dB
Unity−Gain Crossover Frequency (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW)
f
C−
− 350 − kHz
Phase Margin at Unity−Gain (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 kW) f
m
− 65 − deg.
Common Mode Rejection Ratio (V
CC
= 40 V) CMRR 65 90 − dB
Power Supply Rejection Ratio (DV
CC
= 33 V, V
O
= 2.5 V, R
L
= 2.0 kW)
PSRR − 100 − dB
Output Sink Current (V
O
(Pin
3)
= 0.7 V) I
O−
0.3 0.7 − mA
Output Source Current (V
O
(Pin
3)
= 3.5 V) I
O
+ 2.0 −4.0 − mA
PWM COMPARATOR SECTION (Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle) V
TH
− 2.5 4.5 V
Input Sink Current (V
(Pin
3)
= 0.7 V) I
I−
0.3 0.7 − mA
DEADTIME CONTROL SECTION (Test Circuit Figure 11)
Input Bias Current (Pin 4) (V
Pin
4
= 0 V to 5.25 V) I
IB
(DT)
− −2.0 −10
mA
Maximum Duty Cycle, Each Output, Push−Pull Mode
(V
Pin
4
= 0 V, C
T
= 0.01 mF, R
T
= 12 kW)
(V
Pin
4
= 0 V, C
T
= 0.001 mF, R
T
= 30 kW)
DC
max
45
−
48
45
50
50
%
Input Threshold Voltage (Pin 4)
(Zero Duty Cycle)
(Maximum Duty Cycle)
V
th
−
0
2.8
−
3.3
−
V
OSCILLATOR SECTION
Frequency (C
T
= 0.001 mF, R
T
= 30 kW)
f
osc
− 40 − kHz
Standard Deviation of Frequency* (C
T
= 0.001 mF, R
T
= 30 kW) sf
osc
− 3.0 − %
Frequency Change with Voltage (V
CC
= 7.0 V to 40 V, T
A
= 25°C)
Df
osc
(DV)
− 0.1 − %
Frequency Change with Temperature (DT
A
= T
low
to T
high
)
(C
T
= 0.01 mF, R
T
= 12 kW)
Df
osc
(DT)
− − 12 %
UNDERVOLTAGE LOCKOUT SECTION
Turn−On Threshold (V
CC
increasing, I
ref
= 1.0 mA) V
th
5.5 6.43 7.0 V
TOTAL DEVICE
Standby Supply Current (Pin 6 at V
ref
, All other inputs and outputs open)
(V
CC
= 15 V)
(V
CC
= 40 V)
I
CC
−
−
5.5
7.0
10
15
mA
Average Supply Current
(C
T
= 0.01 mF, R
T
= 12 kW, V
(Pin
4)
= 2.0 V)
(V
CC
= 15 V) (See Figure 12)
− 7.0 −
mA
* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, s
N
n = 1
S (X
n
− X)
2
N − 1
P1-P3P4-P6P7-P9P10-P12P13-P14

TL494BDR2

Mfr. #:
Buy TL494BDR2
Manufacturer:
ON Semiconductor
Description:
Switching Controllers 40kHz 200mA PWM
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet