Datasheet

www.ti.com
Electrical Characteristics
UC1846-EP
CURRENT-MODE PWM CONTROLLER
SGLS329 – MAY 2006
T
A
= –55 ° C to 125 ° C, V
IN
= 15 V, R
T
= 10 k, C
T
= 4.7 nF, T
A
= T
J
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Reference
Output voltage T
J
= 25 ° C, I
O
= 1 mA 5.05 5.1 5.15 V
Line regulation V
IN
= 8 V to 40 V 5 20 mV
Load regulation I
L
= 1 mA to 10 mA 3 15 mV
Temperature stability Over operating range
(1)
0.4 mV/ ° C
Total output variation Line, load, and temperature
(1)
5 5.2 V
Output noise voltage 10 Hz ≤ f ≤ 10 kHz, T
J
= 25 ° C
(1)
100 µ V
Long-term stability T
J
= 125 ° C, 1000 h 5 mV
Short-circuit output current V
REF
= 0 V –10 –45 mA
Oscillator
Initial accuracy T
J
= 25 ° C 39 43 47 kHz
Voltage stability V
IN
= 8 V to 40 V –1 2 %
Temperature stability Over operating range
(1)
–1 %
Sync output high level 3.9 4.35 V
Sync output low level 2.3 2.5 V
Sync input high level Pin 8 = 0 V 3.9 V
Sync input low level Pin 8 = 0 V 2.5 V
Sync input current Sync voltage = 3.9 V, Pin 8 = 0 V 1.3 1.5 mA
Error Amplifier
Input offset voltage 0.5 5 mV
Input bias current –0.6 –1 µ A
Input offset current 40 250 nA
Common-mode range V
IN
= 8 V to 40 V 0 V
IN
– 2 V
Open-loop voltage gain ∆ V
O
= 1.2 V to 3 V, V
CM
= 2 V 80 105 dB
Unity gain bandwidth T
J
= 25 ° C
(1)
0.7 1 MHz
CMRR V
CM
= 0 V to 38 V, V
IN
= 40 V 75 100 dB
PSRR V
IN
= 8 V to 40 V 80 105 dB
Output sink current V
ID
= –15 mV to –5 V, V
PIN7
= 1.2 V 2 6 mA
Output source current V
ID
= 15 mV to 5 V, V
PIN7
= 2.5 V –0.4 –0.5 mA
High-level output voltage R
L
= 15 k Ω (pin 7) 4.3 4.6 V
Low-level output voltage R
L
= 15 k Ω (pin 7) 0.7 1 V
(1) These parameters, although specified over the recommended operating conditions, are not 100% tested in production.
4
Submit Documentation Feedback