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UCC28C40 Datasheet(PDF) 4 Page - Texas Instruments

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Part No. UCC28C40
Description  BICMOS LOW POWER CURRENT MODE PWM CONTROLLER
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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UCC28C40 Datasheet(HTML) 4 Page - Texas Instruments

 
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UCC28C40, UCC28C41, UCC28C42, UCC28C43, UCC28C44, UCC28C45
UCC38C40, UCC38C41, UCC38C42, UCC38C43, UCC38C44, UCC38C45
SLUS458C − AUGUST 2001 − REVISED SEPTEMBER 2003
4
www.ti.com
electrical characteristics VDD = 15 V (See Note 1), RT = 10 kΩ, CT = 3.3 nF, CVDD = 0.1µF and no load
on the outputs, TA = −40°C to 105°C for the UCC28C4x and TA = 0°C to 70°C for the UCC38C4x,
TA = TJ (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Output Section
VOUT low (RDS(on) pull-down)
ISINK = 200 mA
5.5
15
VOUThigh (RDS(on) pull-up)
ISOURCE = 200 mA
10
25
Rise tIme
TA = 25°C,
CLOAD = 1 nF
25
50
ns
Fall time
TA = 25°C,
CLOAD = 1 nF
20
40
ns
Undervoltage Lockout Section
UCC38C42, UCC38C44
13.5
14.5
15.5
Start threshold
UCC38C43, UCC38C45
7.8
8.4
9.0
Start threshold
UCC38C40, UCC38C41
6.5
7.0
7.5
V
UCC38C42, UCC38C44
8
9
10
V
Minimum operating voltage
UCC38C43, UCC38C45
7.0
7.6
8.2
Minimum operating voltage
UCC38C40, UCC38C41
6.1
6.6
7.1
PWM Section
Maximum duty cycle
UCC38C42, UCC38C43, UCC38C40, VFB < 2.4 V
94%
96%
Maximum duty cycle
UCC38C44, UCC38C45, UCC38C41, VFB < 2.4 V
47%
48%
Minimum duty cycle
VFB > 2.6 V
0%
Current Supply Section
Start-up current (ISTART-UP)
VDD = Undervoltage lockout start threshold (−0.5 V)
50
100
µA
Operating supply current (IDD)
VFB = VCS = 0 V
2.3
3.0
mA
NOTE 1:
Adjust VDD above the start threshold before setting at 15 V.
1
2
3
4
8
7
6
5
COMP
FB
CS
RT/CT
VREF
VDD
OUT
GND
PDIP (P) or SOIC (D) PACKAGE
(TOP VIEW)
MSOP (DGK) PACKAGE
(TOP VIEW)
VREF
VDD
OUT
GND
8
7
6
5
1
2
3
4
COMP
FB
CS
RT/CT


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