Texas Instruments UCC1806L883B, UCC1806L, UCC1806J883B, UCC1806J Datasheet

UCC1806
UCC2806
UCC3806

Low Power, Dual Output, Current Mode PWM Controller

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

DESCRIPTION

The UCC1806 family of BiCMOS PWM controllers offers exceptionally im­proved performance with a familiar architecture. With the same block dia­gram 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 ap­plications 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, volt­age feed-forward, parallelability with current sharing, pulse-by-pulse current
limiting, and push-pull symmetry correction are readily achievable with the
UCC1806 series.

(continued)

10

7

3

8

SYNC

9RT

4.4V 1.5V

OSC

LO

CT

3X

4

5

EA

6

120µA

1

S

1

QB

R

S

2

13 VC

11 AOUT

14 BOUT

12 GND

T

Q

QB

SHUTDOWN

LOCK OUT

S

1

Q

R

S

2

200µA

Q

R

S

16

200k

1.00V

0.35V

Q

R

S

CURRENT LIMIT

RESTART

UNDER VOLTAGE LOCKOUT

15

15V

5.1V
REFERENCE
REGULATOR

REFERENCE LOW

4.25V

2

CURLIM

SHUTDOWN

VREF

0.5V

–
+

COMP

7.0V

7.5V

CS–

CS+

NI

INV

COMP

VIN

BLOCK DIAGRAM

02/99

UDG-99035

Pin numbers refer to DIL-16 package.

2

UCC1806
UCC2806
UCC3806

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 +VIN +0.3V

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

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

Power Dissipation at TA= 25°C (Note 3). . . . . . . . . . . 1000mW

Power Dissipation at TC= 25°C (Note 3). . . . . . . . . . . 2000mW

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

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

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-

ABSOLUTE MAXIMUM RATINGS

CONNECTION DIAGRAMS

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; VIN= 12V, RT= 33k, CT = 330pF,
C

BYPASS

on V

REF

= 0.01µF, TA= TJ.

PARAMETER TEST CONDITION UCC1806 / UCC2806 UCC3806 UNITS

MIN TYP MAX MIN TYP MAX

Reference Section

Output Voltage T

J

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

Load Regulation 0.2mA < I

O

< 5mA 3 25 3 25 mV
Temperature Stability (Note 5) 0.2 0.6 0.2 0.6 mV/°C
Total Output Variation Line, Load, Temperature (Note 7) −150 150 −150 150 mV
Output Noise Voltage 10Hz ≤ f ≤ 10kHz, T

J

= 25°C

(Note 5)

70 70 µV

Long Term Stability T

A

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

Output Short Circuit −10 −30 −10 −30 mA

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

These devices are available with multiple package op­tions for both through-hole and surface mount applica­tions; 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 oper­ation from 0°C to +70°C. The part is available in DIP and
SOIC packages.

DESCRIPTION (continued)

3

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; VIN= 12V, RT= 33k, CT = 330pF,
C

BYPASS

on V

REF

= 0.01µF, TA= TJ.

PARAMETER TEST CONDITION UCC1806 / UCC2806 UCC3806 UNITS

MIN TYP MAX MIN TYP MAX

Oscillator Section

Initial Accuracy T

J

= 25°C 424752424752kHz

Temperature Stability T

MIN

< TA< T

MAX

(Note 5) 2 2 %
Amplitude 2.35 2.35 V
SYNC Delay to Outputs Pin 8 = 0V, Pin 9 = V

REF

,

V

SYNC

= 0.8V to 2.0V

50 125 50 100 ns

Discharge Current T

J

= 25°C, V

PIN

8 = 2.0V 2 2 mA

SYNC, V

OL

I

OUT

= +1mA 0.4 0.4 V

SYNC, V

OH

I

OUT

= –4mA 2.4 2.4 V

SYNC, V

IL

Pin 8 = 0V, Pin 9 = V

REF

0.8 0.8 V

SYNC, V

IH

Pin 8 = 0V, Pin 9 = V

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

IN

-2 0 VIN−2V

Open Loop Gain V

O

= 1.0 to 4.0 80 100 80 100 dB
Unity Gain Bandwidth 1 1 MHz
Output Sink Current V

ID

< –20mV, V

PIN 7

= 1.0V 1 1 mA

Output Source Current V

ID

< 20mV, V

PIN 7

= 3.0V −80 −120 −80 −120 µA

Output High Level V

ID

= –50mV 4.5 4.5 V

Output Low Level V

ID

= –50mV 0.5 0.5 V

Current Sense Amplifier Section

Amplifier Gain V

PIN 3

= 0V, V

PIN 1

= V

REF

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

Maximum Differential Input
Signal (V

PIN 4 - VPIN 3)

V

PIN 1

= V

REF

, V

PIN 5

= V

REF

,

V

PIN 6

= 0V

1.1 1.1 V

Input Offset Voltage V

PIN 1

= 0.5V, V

PIN 7

= OPEN 10 30 10 50 mV

CMRR V

CM

= 0 to VIN– 3.5 60 60 dB
PSRR 56 56 dB
Input Bias Current V

PIN 1

= 0.5V, PIN 7 OPEN (Note 3) −1 −1 µA

Input Offset Current V

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

Delay to Outputs V

PIN 5

= V

REF

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

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

125 175 125 175 ns

Current Limit Adjust Section

Current Limit Offset V

PIN 3

= 0, V

PIN 4

= 0, PIN 7 = open 0.40 0.50 0.60 0.40 0.50 0.60 V
Input Bias Current 11µA
Minimum Latching Current 300 200 300 200 µA
Maximum Non-Latching

Current

200 80 200 80 µA

Shutdown Terminal Section

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

IN 0VIN V

Delay to Outputs V

PIN 16

= 0 to 1.3V 75 150 75 150 ns