IRS2541 International Rectifier, IRS2541 Datasheet - Page 5

• Manufacturer Part Number: IRS2541
• Description: (IRS2540 / IRS2541) LED Buck Regulator Control IC
• Manufacturer: International Rectifier

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DataSheet
Functional Block Diagram
Lead Assignment
www.irf.com
4
U
ENN
IFB
.com
Electrical Characteristics
V
CC
4
3
= V
Symbol
Watchdog timer
COM
ENN
VCC
100 K
IFB
BS
P
t
WWD
Pin Assignments
WD
= V
1
2
3
4
BIAS
= 14 V +/- 0.25 V, C
Watchdog timer period
LO pulse width
REFERENCE
BANDGAP
UVLO
8
7
6
5
UVN
0. 5 V
2 V
HO
VB
VS
LO
Definition
LO
Values in block diagram are typical values
=C
HO
=1000 pF, C
Pin # Symbol
1
2
3
4
5
6
7
8
VCC
=C
VBS
COM
ENN
VCC
IFB
HO
LO
VS
VB
=0.1 µF, T
Min
---
---
Timer20 µS
Watchdog
High-side floating return
High-side gate driver output
High-side gate driver floating supply
IC power & signal ground
Low-side gate driver output
Current feedback
Supply voltage
Disable outputs (LO=High, HO=Low)
Typ Max
A
=25 °C unless otherwise specified.
1.0
20
Description
---
---
DELAY
1 µS Pulse
Generator
Units Test Conditions
LEVEL
SHIFT
µs
IRS254(0,1)(S)PbF
DELAY
FILTER &
PULSE
LATCH
I
FB
=1 V
15.6 V
Page 5
8
7
6
1
5
2
COM
VCC
HO
VB
VS
LO