User's Manual

© SENSITECH INC. CONFIDENTIAL – CONTROLLED DOCUMENT Page 17 of 83
A Carrier Corp. Company
PART NUMBER T82002163
REV A
PARTS LIST
Location Description Specification Size Qty Vendor
U1
PROTECTION
IC
S-8232ABFT-T2 TSSOP-8 1 SEIKO
Q1 N-CH FET FTD2017A TSSOP-8 1 SANYO
R1，R2R
3,R4
CHIP
RESISTOR
1Kohm (J) 1608 Size 4
R5
CHIP
RESISTOR
4.7Mohm (J) 1608 Size 1
YAGEO,TAMA,
KAMAYA,
ROHM ,SEM ,
Any Approved Vendor
R6
CHIP
POWER
RESISTOR
R020ohm 6331 Size 1
YAGEO,TAMA,
KAMAYA,
ROHM ,SEM ,
Any Approved Vendor
C1,C2,C3
CHIP
CAPACITOR
0.1uF 25V (Z ) 1608 Size 3
YAGEO,PHYCOMP,
KYOCERA,ROHM,
SAMWHA,SEM,
Any Approved Vendor
PCB
FR-4,1oz,0.6t,
2Layer
40*7 1
5. LM25116 Wide Range Synchronous Buck Controller
• The LM25116 is a synchronous buck controller intended for step-down regulator applications
from a high voltage or widely varying input supply.
• The control method is based upon current mode control utilizing an emulated current ramp.
• Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease
of loop compensation.
• The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation
circuit, allowing reliable control of very small duty cycles necessary in high input voltage
applications.
• The LM25116 drives external high-side and low-side NMOS power switches with adaptive dead-
time control.
• A user-selectable diode emulation mode enables discontinuous mode operation for improved
efficiency at light load conditions.
• A low quiescent current shutdown disables the controller and consumes less than 10µA of total
input current.