Texas Instruments UCC3806QTR, UCC3806Q, UCC3806N, UCC3806J, UCC3806DWTR Datasheet

application

INFO

available

Low Power, Dual Output, Current Mode PWM Controller

UCC1806
UCC2806
UCC3806

FEATURES

BiCMOS Version of UC1846 Families

•

1.4mA Maximum Operating Current

•
100µA Maximum Startup Current

•

1.0A Peak Output Current

•

125nsec Circuit Delay

•

Easier Parallelability

•

Improved Benefits of Current Mode

•

Control

BLOCK DIAGRAM

10

SYNC

4.4V 1.5V

9RT

DESCRIPTION

The UCC1806 family of BiCMOS PWM controllers offers exceptionally im
proved performance with a familiar architecture. With the same block dia
gram and pinout of the popular UC1846 series, the UCC1806 line features
increased switching frequency capability while greatly reducing the bias
current used within the device. With a typical startup current of 50µA and a
well defined voltage threshold for turn-on, these devices are favored for ap
plications ranging from off-line power supplies to battery operated portable
equipment. Dual high current, FET driving outputs and a fast current sense
loop further enhance device versatility.

All the benefits of current mode control including simpler loop closing, volt
age feed-forward, parallelability with current sharing, pulse-by-pulse current
limiting, and push-pull symmetry correction are readily achievable with the
UCC1806 series.

(continued)

13 VC

11 AOUT

-

-

-

-

OSC

8

CT

CS–

CS+

INV

COMP

VIN

3

4

NI

5

6

7

15

15V

EA

7.0V

7.5V

LO

3X

–
+

REFERENCE
REGULATOR

0.5V

5.1V

120µA

S

R

4.25V

Pin numbers refer to DIL-16 package.

COMP

Q

R

S

1

S

2

S

1

S

2

R

REFERENCE LOW

QB

Q

T

SHUTDOWN

LOCK OUT

UNDER VOLTAGE LOCKOUT

Q

QB

200µA

R

Q

S

CURRENT LIMIT

RESTART

0.35V

1.00V

14 BOUT

12 GND

16

200k

1

CURLIM

SHUTDOWN

2

VREF

UDG-99035

SLUS272A - FEBRUARY 2000

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, Low Impedance (Pin 15) . . . . . . . . . . . . . +15V

Supply Current, High Impedance (Pin 15) . . . . . . . . . . . +25mA

Output Supply Voltage (Pin 13). . . . . . . . . . . . . . . . . . . . . +18V

Output Current, Continuous Source or Sink. . . . . . . . . ±200mA

Output Current, Gate Drive. . . . . . . . . . . . . . . . . . . . . .±500mA

Analog Input Voltage (Pin 3, 4, 5, 6, 16) . . −0.3V to +V

Sync Output Current (Pin 10) . . . . . . . . . . . . . . . . . . . . .±30mA

Error Amplifier Output Current (Pin 7) . +10mA/− (Self Limiting)
Power Dissipation at T
Power Dissipation at T

Storage Temperature Range . . . . . . . . . . . . . . 65°C to +150°C

Lead Temperature (soldering, 10 seconds). . . . . . . . . . +300°C

= 25°C (Note 3). . . . . . . . . . . 1000mW

A

= 25°C (Note 3). . . . . . . . . . . 2000mW

C

IN +0.3V

Note 1. All voltages are with respect to Ground, Pin 12.
Note 2. Currents are positive into, negative out of the specified

terminal.
Note 3. Consult packaging section of databook for thermal limi

tations and considerations of package.
Note 4. Pin numbers refer to DIL-16 package.

CONNECTION DIAGRAMS

DESCRIPTION (continued)

These devices are available with multiple package op
tions for both through-hole and surface mount applica
tions; and in commercial, industrial, and military
temperature ranges.Contact factory for availability.

The UCC1806 is specified for operation from –55°C to
+125°C, the UCC2806 is specified for operation from
–40°C to +85°C, and the UCC3806 is specified for oper
ation from 0°C to +70°C.The part is available in DIP and
SOIC packages.

-

UCC1806
UCC2806
UCC3806

-

-

-

DIL-16 (Top View)
J or N, DW PACKAGE

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for TA= –55°C to +125°C for the

UCC1806, −40°C to +85°C for the UCC2806, and 0°C to +70°C for the UCC3806; V
C

BYPASS

Reference Section

on V

PARAMETER TEST CONDITION UCC1806 / UCC2806 UCC3806 UNITS

Output Voltage T
Load Regulation 0.2mA < I
Total Output Variation Line, Load, Temperature (Note 7) −150 150 −150 150 mV
Output Noise Voltage 10Hz ≤ f ≤ 10kHz, T

Long Term Stability T
Output Short Circuit −10 −30 −10 −30 mA

= 0.01µF, TA=TJ.

REF

= 25°C, IO= 0.2mA 5.02 5.10 5.17 5.00 5.10 5.20 V

J

< 5mA 3 25 3 25 mV

O

= 25°C

(Note 5)

= 125°C, 1000 Hours (Note 5) 5 25 5 25 mV

A

J

PLCC-20, LCC-20 (Top View)
Q, L PACKAGE

= 12V, RT= 33k, CT = 330pF,

IN

MIN TYP MAX MIN TYP MAX

70 70 µV

2

UCC1806
UCC2806
UCC3806

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for TA= –55°C to +125°C for the

UCC1806, −40°C to +85°C for the UCC2806, and 0°C to +70°C for the UCC3806; V
C

BYPASS

on V

= 0.01µF, TA=TJ.

REF

PARAMETER TEST CONDITION UCC1806 / UCC2806 UCC3806 UNITS

MIN TYP MAX MIN TYP MAX

Oscillator Section

Initial Accuracy T
Temperature Stability T

= 25°C 424752424752kHz

J
MIN

< TA<T

(Note 5) 2 2 %

MAX

Amplitude 2.35 2.35 V
SYNC Delay to Outputs Pin 8 = 0V, Pin 9 = V

V

= 0.8V to 2.0V

SYNC

Discharge Current T
SYNC, V
SYNC, V
SYNC, V
SYNC, V

OL
OH
IL
IH

= 25°C, V

J

I

= +1mA 0.4 0.4 V

OUT

I

= –4mA 2.4 2.4 V

OUT

8 = 2.0V 2 2 mA

PIN

Pin 8 = 0V, Pin 9 = V
Pin 8 = 0V, Pin 9 = V

REF

REF
REF

,

2.0 2.0 V

SYNC Input Current −1+1−1+1µA

Error Amplifier Section

Input Offset Voltage 5 10 mV
Input Bias Current −1 −1 µA
Input Offset Current 500 500 nA
Common Mode Range 0 V
Open Loop Gain V

= 1.0 to 4.0 80 100 80 100 dB

O

Unity Gain Bandwidth 1 1 MHz
Output Sink Current V
Output Source Current V
Output High Level V
Output Low Level V

< –20mV, V

ID

< 20mV, V

ID

= –50mV 4.5 4.5 V

ID

= –50mV 0.5 0.5 V

ID

= 1.0V 1 1 mA

PIN 7

= 3.0V −80 −120 −80 −120 µA

PIN 7

Current Sense Amplifier Section

Amplifier Gain V
Maximum Differential Input

Signal (V

PIN 4 -VPIN 3)

Input Offset Voltage V
CMRR V

= 0V, V

PIN 3

V

PIN 1=VREF,VPIN 5=VREF

V

= 0V

PIN 6

= 0.5V, V

PIN 1

= 0 to VIN– 3.5 60 60 dB

CM

PIN 1=VREF

PIN 7

(Notes 3,4) 2.75 3 3.35 2.75 3 3.35 V/V

,

1.1 1.1 V

= OPEN 10 30 10 50 mV

PSRR 56 56 dB
Input Bias Current V
Input Offset Current V
Delay to Outputs V

= 0.5V, PIN 7 OPEN (Note 3) −1 −1 µA

PIN 1
PIN 1 = 0.5V, PIN 7 OPEN (Note 3) 1 1 µA

PIN 5=VREF

, PIN 6 = 0, PIN 1 = 2.75V,

PIN 4 – PIN 3 = 0 to 1.5V step (Note 6)

Current Limit Adjust Section

Current Limit Offset V

PIN 3

= 0, V

= 0, PIN 7 = open 0.40 0.50 0.60 0.40 0.50 0.60 V

PIN 4

Input Bias Current 11µA
Minimum Latching Current 300 200 300 200 µA
Maximum Non-Latching

Current

Shutdown Terminal Section

Threshold Voltage 0.94 1.00 1.06 0.9 1.0 1.1 V
Input Voltage Range 0 V
Delay to Outputs V

= 0 to 1.3V 75 150 75 150 ns

PIN 16

= 12V, RT= 33k, CT = 330pF,

IN

50 125 50 100 ns

0.8 0.8 V

-2 0 VIN−2V

IN

125 175 125 175 ns

200 80 200 80 µA

IN 0VIN V

3