Texas Instruments UCC3805PWTR, UCC3805PW, UCC1800J, UCC1805J883B, UCC1805J Datasheet
...
UCC1800/1/2/3/4/5
UCC2800/1/2/3/4/5
UCC3800/1/2/3/4/5
Low-Power BiCMOS Current-Mode PWM
FEATURES
∙100μA Typical Starting Supply Current
∙500μA Typical Operating Supply Current
∙Operation to 1MHz
∙Internal Soft Start
∙Internal Fault Soft Start
∙Internal Leading-Edge Blanking of the Current Sense Signal
∙1 Amp Totem-Pole Output
∙70ns Typical Response from Current-Sense to Gate Drive Output
∙1.5% Tolerance Voltage Reference
∙Same Pinout as UC3842 and UC3842A
DESCRIPTION
The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching power supplies with minimal parts count.
These devices have the same pin configuration as the UC1842/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
The UCC1800/1/2/3/4/5 family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC1803 and UCC1805 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC1802 and UCC1804 make these ideal choices for use in off-line power supplies.
The UCC180x series is specified for operation from –55oC to +125oC, the UCC280x series is specified for operation from –40oC to +85oC, and the UCC380x series is specified for operation from 0oC to +70oC.
Part Number |
Maximum Duty Cycle |
Reference Voltage |
Turn-On Threshold |
Turn-Off Threshold |
UCCx800 |
100% |
5V |
7.2V |
6.9V |
UCCx801 |
50% |
5V |
9.4V |
7.4V |
UCCx802 |
100% |
5V |
12.5V |
8.3V |
UCCx803 |
100% |
4V |
4.1V |
3.6V |
UCCx804 |
50% |
5V |
12.5V |
8.3V |
UCCx805 |
50% |
4V |
4.1V |
3.6V |
BLOCK DIAGRAM
UDG92009-3 |
03/99 |
ABSOLUTE MAXIMUM RATINGS (Note 1)
VCC Voltage (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0V VCC Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0mA OUT Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.0A
OUT Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . 20.0μJ Analog Inputs (FB, CS) . . . . . . . . . . . . . . . . . . . . –0.3V to 6.3V Power Dissipation at TA < +25°C (N or J Package) . . . . . 1.0W Power Dissipation at TA < +25°C (D Package). . . . . . . . 0.65W Storage Temperature Range. . . . . . . . . . . . . –65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . +300°C
Note 1: All voltages are with respect to GND. All currents are positive into the specified terminal. Consult Unitrode databook for information regarding thermal specifications and limitations of packages.
Note 2: In normal operation VCC is powered through a current limiting resistor. Absolute maximum of 12V applies when VCC is driven from a low impedance source such that ICC does not exceed 30mA.
TEMPERATURE AND PACKAGE SELECTION
|
Temperature Range |
Available Packages |
UCC1800 |
–55°C to +125°C |
J |
UCC2800 |
–40°C to +85°C |
N, D, PW |
UCC3800 |
0°C to +70°C |
N, D, PW |
ORDERING INFORMATION
UCC 
80
PACKAGE
PRODUCT OPTION
TEMPERATURE RANGE
UCC1800/1/2/3/4/5
UCC2800/1/2/3/4/5
UCC3800/1/2/3/4/5
CONNECTION DIAGRAMS
TSSOP-8 (Top View) |
|
|
|
PW Package |
|
|
|
1 |
COMP |
REF |
8 |
2 |
FB |
VCC |
7 |
3 |
CS |
OUT |
6 |
4 |
RC |
GND |
5 |
DIL-8, SOIC-8 (Top View)
J or N, D Package
COMP |
|
|
|
REF |
1 |
|
8 |
||
FB |
|
|
|
VCC |
|
|
|
||
2 |
|
7 |
||
CS |
|
|
|
OUT |
|
|
|
||
3 |
|
6 |
||
RC |
|
|
|
GND |
|
|
|
||
4 |
|
5 |
||
|
|
|
|
|
|
|
|
|
|
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for –55°C ≤ TA ≤ +125°C for UCC180x; –40°C ≤ TA ≤ +85°C for UCC280x; 0°C ≤ TA ≤ +70°C for UCC380x; V CC=10V (Note 3); RT=100k from REF to RC; CT=330pF from RC to GND; 0.1μF capacitor from VCC to GND; 0.1μF capacitor from VREF to GND. TA=TJ.
PARAMETER |
TEST CONDITIONS |
UCC180X |
UCC380X |
UNITS |
||||
|
|
UCC280X |
|
|
|
|
||
|
|
MIN |
TYP |
MAX |
MIN |
TYP |
MAX |
|
Reference Section |
|
|
|
|
|
|
|
|
Output Voltage |
TJ=+25°C, I=0.2mA, UCCx800/1/2/4 |
4.925 |
5.00 |
5.075 |
4.925 |
5.00 |
5.075 |
V |
|
TJ=+25°C, I=0.2mA, UCCx803/5 |
3.94 |
4.00 |
4.06 |
3.94 |
4.00 |
4.06 |
|
Load Regulation |
0.2mA<I<5mA |
|
10 |
30 |
|
10 |
25 |
mV |
Total Variation |
UCCx800/1/2/4 (Note 7) |
4.88 |
5.00 |
5.10 |
4.88 |
5.00 |
5.10 |
V |
|
UCCx803/5 (Note 7) |
3.90 |
4.00 |
4.08 |
3.90 |
4.00 |
4.08 |
V |
Output Noise Voltage |
10Hz ≤ f ≤ 10kHz, TJ=+25°C (Note 9) |
|
130 |
|
|
130 |
|
μV |
Long Term Stability |
TA=+125°C, 1000 Hours (Note 9) |
|
5 |
|
|
5 |
|
mV |
Output Short Circuit |
|
–5 |
|
–35 |
–5 |
|
–35 |
mA |
Oscillator Section |
|
|
|
|
|
|
|
|
Oscillator Frequency |
UCCx800/1/2/4 (Note 4) |
40 |
46 |
52 |
40 |
46 |
52 |
kHz |
|
UCCx803/5 (Note 4) |
26 |
31 |
36 |
26 |
31 |
36 |
kHz |
Temperature Stability |
(Note 9) |
|
2.5 |
|
|
2.5 |
|
% |
Amplitude peak-to-peak |
|
2.25 |
2.40 |
2.55 |
2.25 |
2.40 |
2.55 |
V |
Oscillator Peak Voltage |
|
|
2.45 |
|
|
2.45 |
|
V |
2
UCC1800/1/2/3/4/5
UCC2800/1/2/3/4/5
UCC3800/1/2/3/4/5
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for –55°C ≤ TA ≤ +125°C for UCC180x; –40°C ≤ TA ≤ +85°C for UCC280x; 0°C ≤ TA ≤ +70°C for UCC380x; V CC=10V (Note 3); RT=100k from REF to RC; CT=330pF from RC to GND; 0.1μF capacitor from VCC to GND; 0.1μF capacitor from VREF to GND. TA=TJ.
PARAMETER |
TEST CONDITIONS |
UCC180X |
|
|
UCC380X |
|
UNITS |
||||
|
|
UCC280X |
|
|
|
|
|
|
|
||
Error Amplifier Section |
|
|
|
|
|
|
|
|
|
|
|
Input Voltage |
COMP=2.5V; UCCx800/1/2/4 |
2.44 |
2.50 |
|
2.56 |
2.44 |
|
2.50 |
|
2.56 |
V |
|
COMP=2.0V; UCCx803/5 |
1.95 |
2.0 |
|
2.05 |
1.95 |
|
2.0 |
|
2.05 |
|
Input Bias Current |
|
–1 |
|
|
1 |
–1 |
|
|
|
1 |
μA |
Open Loop Voltage Gain |
|
60 |
80 |
|
|
60 |
|
80 |
|
|
dB |
COMP Sink Current |
FB=2.7V, COMP=1.1V |
0.3 |
|
|
3.5 |
0.4 |
|
|
|
2.5 |
mA |
COMP Source Current |
FB=1.8V, COMP=REF–1.2V |
–0.2 |
–0.5 |
|
–0.8 |
–0.2 |
|
–0.5 |
|
–0.8 |
mA |
Gain Bandwidth Product |
(Note 9) |
|
2 |
|
|
|
|
2 |
|
|
MHz |
PWM Section |
|
|
|
|
|
|
|
|
|
|
|
Maximum Duty Cycle |
UCCx800/2/3 |
97 |
99 |
|
100 |
97 |
|
99 |
|
100 |
% |
|
UCCx801/4/5 |
48 |
49 |
|
50 |
48 |
|
49 |
|
50 |
|
Minimum Duty Cycle |
COMP=0V |
|
|
|
0 |
|
|
|
|
0 |
% |
Current Sense Section |
|
|
|
|
|
|
|
|
|
|
|
Gain |
(Note 5) |
1.10 |
1.65 |
|
1.80 |
1.10 |
|
1.65 |
|
1.80 |
V/V |
Maximum Input Signal |
COMP=5V (Note 6) |
0.9 |
1.0 |
|
1.1 |
0.9 |
|
1.0 |
|
1.1 |
V |
Input Bias Current |
|
–200 |
|
|
200 |
–200 |
|
|
200 |
nA |
|
CS Blank Time |
|
50 |
100 |
|
150 |
50 |
|
100 |
|
150 |
ns |
Over-Current Threshold |
|
1.42 |
1.55 |
|
1.68 |
1.42 |
|
1.55 |
|
1.68 |
V |
COMP to CS Offset |
CS=0V |
0.45 |
0.90 |
|
1.35 |
0.45 |
|
0.90 |
|
1.35 |
V |
Output Section |
|
|
|
|
|
|
|
|
|
|
|
OUT Low Level |
I=20mA, all parts |
|
0.1 |
|
0.4 |
|
|
0.1 |
|
0.4 |
V |
|
I=200mA, all parts |
|
0.35 |
|
0.90 |
|
|
0.35 |
|
0.90 |
V |
|
I=50mA, VCC=5V, UCCx803/5 |
|
0.15 |
|
0.40 |
|
|
0.15 |
|
0.40 |
V |
|
I=20mA, VCC=0V, all parts |
|
0.7 |
|
1.2 |
|
|
0.7 |
|
1.2 |
V |
OUT High VSAT |
I=–20mA, all parts |
|
0.15 |
|
0.40 |
|
|
0.15 |
|
0.40 |
V |
(VCC-OUT) |
I=–200mA, all parts |
|
1.0 |
|
1.9 |
|
|
1.0 |
|
1.9 |
V |
|
I=–50mA,VCC=5V, UCCx803/5 |
|
0.4 |
|
0.9 |
|
|
0.4 |
|
0.9 |
V |
Rise Time |
CL=1nF |
|
41 |
|
70 |
|
|
41 |
|
70 |
ns |
Fall Time |
CL=1nF |
|
44 |
|
75 |
|
|
44 |
|
75 |
ns |
Undervoltage Lockout Section |
|
|
|
|
|
|
|
|
|
|
|
Start Threshold (Note 8) |
UCCx800 |
6.6 |
7.2 |
|
7.8 |
6.6 |
|
7.2 |
|
7.8 |
V |
|
UCCx801 |
8.6 |
9.4 |
|
10.2 |
8.6 |
|
9.4 |
|
10.2 |
V |
|
UCCx802/4 |
11.5 |
12.5 |
|
13.5 |
11.5 |
|
12.5 |
|
13.5 |
V |
|
UCCx803/5 |
3.7 |
4.1 |
|
4.5 |
3.7 |
|
4.1 |
|
4.5 |
V |
Stop Threshold (Note 8) |
UCCx1800 |
6.3 |
6.9 |
|
7.5 |
6.3 |
|
6.9 |
|
7.5 |
V |
|
UCCx1801 |
6.8 |
7.4 |
|
8.0 |
6.8 |
|
7.4 |
|
8.0 |
V |
|
UCCx802/4 |
7.6 |
8.3 |
|
9.0 |
7.6 |
|
8.3 |
|
9.0 |
V |
|
UCCx803/5 |
3.2 |
3.6 |
|
4.0 |
3.2 |
|
3.6 |
|
4.0 |
V |
Start to Stop Hysteresis |
UCCx800 |
0.12 |
0.3 |
|
0.48 |
0.12 |
|
0.3 |
|
0.48 |
V |
|
UCCx801 |
1.6 |
2 |
|
2.4 |
1.6 |
|
2 |
|
2.4 |
V |
|
UCCx802/4 |
3.5 |
4.2 |
|
5.1 |
3.5 |
|
4.2 |
|
5.1 |
V |
|
UCCx803/5 |
0.2 |
0.5 |
|
0.8 |
0.2 |
|
0.5 |
|
0.8 |
V |
3
Loading...