Motorola TL594CDR2, TL594CD, TL594IN, TL594CN Datasheet

 
  
 

The TL594 is a fixed frequency, pulse width modulation control circuit

designed primarily for Switchmode power supply control.

• Complete Pulse Width Modulation Control Circuitry

• On–Chip Oscillator with Master or Slave Operation

• On–Chip Error Amplifiers

• On–Chip 5.0 V Reference, 1.5% Accuracy

• Adjustable Deadtime Control

• Uncommitted Output Transistors Rated to 500 mA Source or Sink

• Output Control for Push–Pull or Single–Ended Operation

• Undervoltage Lockout

Order this document by TL594/D



PRECISION SWITCHMODE

PULSE WIDTH MODULATION

CONTROL CIRCUIT

SEMICONDUCTOR

TECHNICAL DATA

D SUFFIX

PLASTIC PACKAGE

CASE 751B

(SO–16)

MAXIMUM RATINGS

unless otherwise noted.)

Power Supply Voltage V
Collector Output Voltage VC1,

Collector Output Current

(each transistor) (Note 1)
Amplifier Input Voltage Range V
Power Dissipation @ TA ≤ 45°C P
Thermal Resistance,

Junction–to–Ambient
Operating Junction Temperature T
Storage Temperature Range T
Operating Ambient Temperature Range

TL594ID, CN

TL594CD, IN
Derating Ambient Temperature T

NOTES: 1.Maximum thermal limits must be observed.

(Full operating ambient temperature range applies,

Rating

Symbol Value Unit

IC1, I

N SUFFIX

PLASTIC PACKAGE

CASE 648

PIN CONNECTIONS

Noninv

1

Input

Input

Compen/PWN

Comp Input

Deadtime

CC

V

C2

C2

IR

D

R

θJA

J

stg

T

A

A

42 V
42 V

500 mA

–0.3 to +42 V

1000 mW

80 °C/W

125 °C

–55 to +125 °C

°C

0 to +70

–25 to +85

45 °C

Control

Ground

ORDERING INFORMATION

Device

TL594CD
TL594CN
TL594IN Plastic

+

Error
Amp

Inv

–

2

3

≈

0.1 V

4

C

5

T

Oscillator

R

6

T

7

C1

89

Operating

Temperature Range

TA = 0° to +70°C

TA = –25° to +85°C

1

2

V

CC

Q1

(Top View)

Error

Amp

5.0 V
REF

+

–

Q2

Noninv

16

Input
Inv

15

Input
V

14

ref

Output

13

Control
V

12

CC

C2

11

E2

10

E1

Package

SO–16

Plastic

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 0

1

TL594

RECOMMENDED OPERATING CONDITIONS

Characteristics Symbol Min Typ Max Unit

Power Supply Voltage V
Collector Output Voltage VC1, V
Collector Output Current (Each transistor) IC1, I
Amplified Input Voltage V
Current Into Feedback Terminal l
Reference Output Current l
Timing Resistor R
Timing Capacitor C
Oscillator Frequency f
PWM Input Voltage (Pins 3, 4, 13) – 0.3 – 5.3 V

CC

C2

C2

in

fb

ref

T
T

osc

7.0 15 40 V
– 30 40 V
– – 200 mA

0.3 – VCC – 2.0 V
– – 0.3 mA
– – 10 mA

1.8 30 500 kΩ

0.0047 0.001 10 µF

1.0 40 200 kHz

ELECTRICAL CHARACTERISTICS (V

For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.

Characteristics

REFERENCE SECTION

Reference Voltage

(IO = 1.0 mA, TA = 25°C)

(IO = 1.0 mA)
Line Regulation (VCC = 7.0 V to 40 V) Reg
Load Regulation (IO = 1.0 mA to 10 mA) Reg
Short Circuit Output Current (V

OUTPUT SECTION

Collector Off–State Current (VCC = 40 V, VCE = 40 V) I
Emitter Off–State Current (VCC = 40 V, VC = 40 V, VE = 0 V) I
Collector–Emitter Saturation Voltage (Note 2)

Common–Emitter (VE = 0 V, IC = 200 mA)

Emitter–Follower (VC = 15 V, IE = –200 mA)
Output Control Pin Current

Low State (VOC ≤ 0.4 V)

High State (VOC = V
Output Voltage Rise T ime

Common–Emitter (See Figure 13)

Emitter–Follower (See Figure 14)
Output Voltage Fall T ime

Common–Emitter (See Figure 13)

Emitter–Follower (See Figure 14)

ERROR AMPLIFIER SECTION

Input Offset Voltage (VO
Input Offset Current (VO
Input Bias Current (VO
Input Common Mode Voltage Range (VCC = 40 V, TA = 25°C) V
Inverting Input Voltage Range V
Open Loop Voltage Gain (∆VO = 3.0 V, VO = 0.5 V to 3.5 V, RL = 2.0 kΩ) A
Unity–Gain Crossover Frequency (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ) f
Phase Margin at Unity–Gain (VO = 0.5 V to 3.5 V, RL = 2.0 kΩ) φm – 65 – deg.
Common Mode Rejection Ratio (VCC = 40 V) CMRR 65 90 – dB
Power Supply Rejection Ratio (∆VCC = 33 V, VO = 2.5 V, RL = 2.0 kΩ) PSRR – 100 – dB
Output Sink Current (VO
Output Source Current (VO

NOTE: 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

ref

(Pin 3)

= 0 V) I

ref

)

= 2.5 V) V

(Pin 3)

= 2.5 V) I

(Pin 3)

= 2.5 V) I

= 0.7 V) IO– 0.3 0.7 – mA

(Pin 3)

= 3.5 V) IO+ –2.0 –4.0 – mA

(Pin 3)

= 15 V, CT = 0.01 µF, RT = 12 kΩ, unless otherwise noted.)

CC

Symbol Min Typ Max Unit

V

SC

C(off)
E(off)

V

SAT(C)

V

SAT(E)

I

OCL

I

OCH

IO
IB

ICR

IR(INV)

VOL

ref

line

load

t

r

t

f

IO

C

4.925

4.9
– 2.0 25 mV
– 2.0 15 mV

15 40 75 mA

– 2.0 100 µA
– – –100 µA

–
–

–
–

–
–

–
–

– 2.0 10 mV
– 5.0 250 nA
– –0.1 –1.0 µA

70 95 – dB

– 700 – kHz

5.0
–

1.1

1.5

0.1

2.0

100
100

40
40

0 to VCC–2.0 V

–0.3 to VCC–2.0 V

5.075

5.1

1.3

2.5

–

20

200
200

100
100

V

V

µA

ns

ns

2

MOTOROLA ANALOG IC DEVICE DATA

TL594

ELECTRICAL CHARACTERISTICS (V

For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies, unless otherwise noted.

Characteristics

PWM COMPARATOR SECTION (Test Circuit Figure 11)

Input Threshold Voltage (Zero Duty Cycle) V
Input Sink Current (V

DEADTIME CONTROL SECTION (Test Circuit Figure 11)

Input Bias Current (Pin 4) (V
Maximum Duty Cycle, Each Output, Push–Pull Mode

(V

= 0 V, CT = 0.01 µF, RT = 12 kΩ)

Pin 4

(V

= 0 V, CT = 0.001 µF, RT = 30 kΩ)

Pin 4

Input Threshold Voltage (Pin 4)

(Zero Duty Cycle)
(Maximum Duty Cycle)

OSCILLATOR SECTION

Frequency

(CT = 0.001 µF, RT = 30 kΩ)
(CT = 0.01 µF, RT = 12 kΩ, TA = 25°C)

(CT = 0.01 µF, RT = 12 kΩ, TA = T
Standard Deviation of Frequency* (CT = 0.001 µF, RT = 30 kΩ) σf
Frequency Change with Voltage (VCC = 7.0 V to 40 V, TA = 25°C) ∆f
Frequency Change with Temperature

(∆TA = T

UNDERVOLTAGE LOCKOUT SECTION

Turn–On Threshold (VCC Increasing, I

TA = 25°C

TA = T
Hysteresis

TL594C,I

TL594M

TOTAL DEVICE

Standby Supply Current (Pin 6 at V

(VCC = 15 V)

(VCC = 40 V)
Average Supply Current (V

VCC = 15 V, See Figure 11)

low

low

to T

to T

high

= 0.7 V) I

Pin 3

= 0 V to 5.25 V) IIB

Pin 4

low

, CT = 0.01 µF, RT = 12 kΩ)

high

, All other inputs and outputs open)

ref

= 2.0 V, CT = 0.01 µF, RT = 12 kΩ,

Pin 4

= 15 V, CT = 0.01 µF, RT = 12 kΩ, unless otherwise noted.)

CC

Symbol Min Typ Max Unit

TH

I–

(DT)

DC

max

V

TH

f

osc

to T

ref

)

high

= 1.0 mA)

osc

(∆V) – 0.2 1.0 %

osc

∆f

(∆T) – 4.0 – %

osc

V

th

V

H

I

CC

– 3.6 4.5 V

0.3 0.7 – mA

– –2.0 –10 µA

45

–

–
0

–

9.2

9.0
– 1.5 – %

4.0

3.5

100

50

–
–

– 11 –

48
45

2.8
–

40
10

–

5.2
–

150
150

8.0

8.0

50

–

3.3
–

–

10.8
12

6.0

6.5

300
300

15
18

%

V

kHz

V

mV

mA

mA

* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula, σ

MOTOROLA ANALOG IC DEVICE DATA

N
Σ (Xn – X

n = 1

N – 1

2

)

3

TL594

Figure 1. Representative Block Diagram

R

T

6

5

C

T

4

Deadtime
Control

Output Control

13

D

Ck

UV

Flip–

Flop

Q

Q

–
+

–
+

3.5V

4.9V

Ref.

Output

Reference

Regulator

Gnd

Oscillator

Deadtime
Comparator

≈

0.12V

≈

0.7V

0.7mA

+

1

–

12 3 1516 14 7

Error Amp

1

Feedback PWM

Comparator Input

–
+

–
+

PWM
Comparator

+

2

–

Error Amp

This device contains 46 active transistors.

Lockout

2

Q1

Q2

8

9

11

10

12

V

CC

V

CC

Capacitor C

Feedback/PWM Comp.

Deadtime Control

T

Flip–Flop

Clock Input

Flip–Flop

Q

Flip–Flop

Q

Output Q1

Emitter

Output Q2

Emitter

Output

Control

Figure 2. Timing Diagram

4

MOTOROLA ANALOG IC DEVICE DATA