irs2540 International Rectifier Corp., irs2540 Datasheet - Page 5

• Manufacturer Part Number: irs2540
• Description: Led Buck Regulator Control Ic -
• Manufacturer: International Rectifier Corp.

Functional Block Diagram
Lead Assignment
www.irf.com
ENN
IFB
Electrical Characteristics
V
CC
4
3
Symbol
= V
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 PS
Watchdog
High-side floating return
High-side gate driver output
High-side gate driver floating supply
IC power & signal ground
Current feedback
Low-side gate driver output
Supply voltage
Disable outputs (LO=High, HO=Low)
Typ Max
A
=25 °C unless otherwise specified.
1.0
20
Description
---
DELAY
---
1 PS 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