Datasheet

UCC2800/2801/2802/2803/2804/2805-EP
LOW-POWER BICMOS CURRENT-MODE PWM
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SGLS135F − SEPTEMBER 2002 − REVISED OCTOBER 2010
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics, T
A
= −40_C to 125_C for Q temp and T
A
= −55_C to 125_C for M temp, V
CC
= 10 V (see Note 1), R
T
= 100 kΩ from REF to RC, C
T
= 330 pF from RC to GND, 0.1 F capacitor from
V
CC
to GND, 0.1 F capacitor from V
REF
to GND and T
A
= T
J
(unless otherwise stated)
PARAMETER TEST CONDITIONS
UCC280XQ,
UCC280XM
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
Oscillator Section
Oscillator frequency
See Note 2
UCC2800/01/02/04 40 46 52
kHz
Oscillator frequency See Note 2
UCC2803/05 26 31 36
kHz
Temperature stability See Note 7 2.5%
Amplitude peak-to-peak 2.25 2.4 2.55 V
Oscillator peak voltage 2.45 V
Error Amplifier Section
Input voltage
COMP = 2.5 V UCC2800/01/02/04 2.44 2.5 2.56
V
Input voltage
COMP = 2 V UCC2803/05 1.95 2 2.05
V
Input bias current −1 1 μA
Open loop voltage gain 60 80 db
COMP sink current FB = 2.7 V, COMP = 1.1 V 0.3 3.5 mA
COMP source current FB = 1.8 V, COMP = REF − 1.2 V −0.2 −0.5 −0.8 mA
Gain bandwidth product See Note 7 2 MHz
PWM Section
Maximum duty cycle
UCC2800/02/03 97% 99% 100%
Maximum duty cycle
UCC2801/04/05 48% 49% 50%
Minimum duty cycle COMP = 0 V 0
Current Sense Section
Gain See Note 3 1.1 1.65 1.8 V/V
Maximum input signal COMP = 5 V, See Note 4 0.9 1 1.1 V
Input bias current −200 200 nA
CS blank time 50 100 150 ns
Overcurrent threshold voltage 1.42 1.55 1.68 V
COMP to CS offset voltage CS = 0 V 0.45 0.9 1.35 V
Output Section (OUT)
I
OUT
= 20 mA All parts 0.1 0.4
Low level output voltage
I
OUT
= 200 mA All parts 0.35 0.9
V
Low-level output voltage
I
OUT
= 50 mA, V
CC
= 5 V UCC2803/05 0.15 0.4
V
I
OUT
= 20 mA, V
CC
= 0 V All parts 0.7 1.2
I
OUT
= −20 mA All parts 0.15 0.4
High-level output voltage V
SAT
(V
CC
− OUT)
I
OUT
= −200 mA All parts 1 1.9
V
High level output voltage V
SAT
(V
CC
OUT)
I
OUT
= −50 mA, V
CC
= 5 V UCC2803/05 0.4 0.9
V
Rise time C
L
= 1 nF 41 70 ns
Fall time C
L
= 1 nF 44 75 ns