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UC2845J Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce UC2845J
Description  Current-Mode PWM Controllers
Download  56 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC2845J Fiches technique(HTML) 6 Page - Texas Instruments

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UC1842, UC2842, UC3842, UC1843, UC2843, UC3843
UC1844, UC2844, UC3844, UC1845, UC2845, UC3845
SLUS223D – APRIL 1997 – REVISED AUGUST 2016
www.ti.com
Product Folder Links: UC1842 UC2842 UC3842 UC1843 UC2843 UC3843 UC1844 UC2844 UC3844 UC1845
UC2845 UC3845
Submit Documentation Feedback
Copyright © 1997–2016, Texas Instruments Incorporated
(1)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
MAX
UNIT
VVCC
Low impedance source
30
V
IVCC < 30 mA
Self Limiting
VVFB and VISENSE
Analog input voltage
–0.3
6.3
V
VVC
Input Voltage, Q and D Package only
30
V
IOUTPUT
Output drive current
±1
A
ICOMP
Error amplifier output sink current
10
mA
EOUTPUT
Output energy (capacitive load)
5
µJ
TJ
Junction temperature
150
°C
Tstg
Storage temperature
–65
150
°C
(1)
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2)
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.2 ESD Ratings
VALUE
UNIT
V(ESD)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1)
±3000
V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2)
±3000
(1)
These recommended voltages for VC and POWER GROUND apply only to the D package.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
TYP
MAX
UNIT
VVCC and VVC
(1)
Supply voltage
12
28
V
VVFB
Input voltage
2.5
V
VISENSE
Input voltage
1
V
IVCC
Supply current, externally limited
25
mA
IOUTPUT
Average output current
200
mA
IVREF
Reference output current
–20
mA
fOSC
Oscillator frequency
100
500
kHz
TA
Operating free-air temperature
UC184x
–55
125
°C
UC284x
–40
85
UC384x
0
70
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
7.4 Thermal Information
THERMAL METRIC(1)
UCx84x
UNIT
D (SOIC)
D (SOIC)
P (PDIP)
FK (LCCC)
8 PINS
14 PINS
8 PINS
20 PINS
RθJA
Junction-to-ambient thermal resistance
104.8
78.2
53.7
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
47.3
37.1
46.7
36.2
°C/W
RθJB
Junction-to-board thermal resistance
45.9
32.6
31
35.4
°C/W
ψJT
Junction-to-top characterization parameter
8.2
7.3
17.1
°C/W
ψJB
Junction-to-bottom characterization parameter
45.2
32.4
30.9
°C/W


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