The UC1842/3/4/5 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count

UC2845

Manufacturer Part NumberUC2845
DescriptionThe UC1842/3/4/5 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count
ManufacturerTexas Instruments
UC2845 datasheet
 


Specifications of UC2845

TopologyBoost, Flyback, ForwardControl MethodCurrent
Duty Cycle(max)(%)50Frequency(max)(khz)450
Uvlo Thresholds On/off(v)8.4/7.6Pin/package14SOIC, 8PDIP, 8SOIC
Vin(min)(v)7.6Vin(max)(v)30
Regulated Outputs(#)1Operating Temperature Range(c)-40 to 85
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3
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5
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7
8
9
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FN (S-PQCC-J**)
20 PIN SHOWN
D
D1
3
1
4
E
E1
8
9
D / E
NO. OF
PINS
**
MIN
0.385 (9,78)
20
0.485 (12,32)
28
0.685 (17,40)
44
0.785 (19,94)
52
0.985 (25,02)
68
1.185 (30,10)
84
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-018
19
0.032 (0,81)
0.026 (0,66)
18
14
0.050 (1,27)
13
0.008 (0,20) NOM
D1 / E1
MAX
MIN
MAX
0.395 (10,03)
0.350 (8,89)
0.356 (9,04)
0.495 (12,57)
0.450 (11,43)
0.456 (11,58)
0.695 (17,65)
0.650 (16,51)
0.656 (16,66)
0.795 (20,19)
0.750 (19,05)
0.756 (19,20)
0.995 (25,27)
0.950 (24,13)
0.958 (24,33)
1.195 (30,35)
1.150 (29,21)
1.158 (29,41)
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
MECHANICAL DATA
MPLC004A – OCTOBER 1994
PLASTIC J-LEADED CHIP CARRIER
Seating Plane
0.004 (0,10)
0.180 (4,57) MAX
0.120 (3,05)
0.090 (2,29)
0.020 (0,51) MIN
D2 / E2
D2 / E2
0.021 (0,53)
0.013 (0,33)
0.007 (0,18)
M
D2 / E2
MIN
MAX
0.141 (3,58)
0.169 (4,29)
0.191 (4,85)
0.219 (5,56)
0.291 (7,39)
0.319 (8,10)
0.341 (8,66)
0.369 (9,37)
0.441 (11,20)
0.469 (11,91)
0.541 (13,74)
0.569 (14,45)
4040005 / B 03/95
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