UC2845AD Microsemi Analog Mixed Signal Group, UC2845AD Datasheet - Page 2

• Manufacturer Part Number: UC2845AD
• Description: IC CTRLR PWM CURRENT MODE 14SOIC
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of UC2845AD

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 8.2 V ~ 25 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Frequency-max: 500kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UC184xA/284xA/384xA
2
Peak Package Solder Reflow Temp. (40 second max. exposure)..........................................260°C (+0, -5)
Supply Voltage (Low Impedance Source) (V
Supply Voltage (I
Output Current ............................................................................................................. ±1A
Output Energy (Capacitive Load) ................................................................................. 5µJ
Analog Inputs (V
Error Amp Output Sink Current ............................................................................... 10mA
Power Dissipation at T
Storage Temperature Range .................................................................... -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) ............................................................. 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
M PACKAGE:
DM PACKAGE:
D PACKAGE:
Y PACKAGE:
Junction Temperature Calculation: T
The
All of the above assume no ambient airflow
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
JA
numbers are guidelines for the thermal performance of the device/pc-board system.
to Ground. Currents are positive into, negative out of the specified terminal. Pin
numbers refer to DIL packages only.
A B S O L U T E M A X I M U M R AT I N G S
FB
CC
& I
< 30mA) .......................................................................... Self Limiting
SENSE
A
= 25°C (M Package) .............................................................. 1W
) ........................................................................ -0.3V to +6.3V
T H ER MAL DATA
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
J
= T
C
A
U R R E N T
+ (P
P
R O D U C T I O N
D
CC
x
) ......................................................... 30V
JA
JA
JA
JA
JA
).
M
O D E
P W M C
(Note 1)
D
A T A
165°C/W
120°C/W
130°C/W
95°C/W
O N T R O L L E R
S
H E E T
RoHS / Pb-free 100% Matte Tin Lead Finish
PACKAGE PIN OUTS
COMP
R
COMP
N.C.
N.C.
I
N.C.
SENSE
T
R
/C
V
I
COMP
SENSE
T
/C
V
FB
R
T
I
M & Y PACKAGE
SENSE
T
FB
/C
T
V
DM PACKAGE
FB
D PACKAGE
T
(Top View)
(Top View)
(Top View)
1
2
3
4
5
6
7
1
2
3
4
1
2
3
4
14
13
12
11
10
8
7
6
5
9
8
8
7
6
5
V
V
OUTPUT
GND
REF
CC
V
V
OUTPUT
GND
V
N.C.
V
V
OUTPUT
GND
PWR GND
Copyright © 1995
REF
CC
REF
CC
C
Rev. 1.2a 10/25