NCP1081 Datasheet, PDF (2/17 Pages) ON Semiconductor – Integrated High Power PoE-PD Interface & DC-DC Converter Controller

NCP1081
DC−DC Converter Controller
• Current mode control
• Supports isolated and non−isolated DC−DC converter
applications
• Internal voltage regulators
• Wide duty cycle range with internal slope
compensation circuitry
• Programmable oscillator frequency
• Programmable soft−start time
VPORTP
CLASS
UVLO
INRUSH
ILIM1
VPORTN1
RTN
VPORTN2
TEST1
TEST2
PIN DIAGRAM
1
Exposed
Pad
SS
FB
COMP
VDDL
VDDH
GATE
ARTN
nCLASS_AT
CS
OSC
Ordering Information
Part Number
NCP1081DEG
Package
TSSOP−20 EP
(Pb−Free)
(Top View)
Shipping Configuration^†
74 units / Tube
Temperature Range
−40°C to 85°C
NCP1081DER2G
TSSOP−20 EP
(Pb−Free)
2500 / Tape & Reel
−40°C to 85°C
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
VPORTP
DETECTION
INTERNAL
SUPPLY
&
BANDGAP
THERMAL
SHUT
DOWN
VDDH
VDDL
VDDH
VDDL
CLASS
UVLO
INRUSH
ILIM1
VPORTN1,2
CLASSIFICATION
UVLO
VPORT
MONITOR
INRUSH
ILIM1
HOT SWAP SWITCH
CONTROL & CURRENT
LIMIT BLOCKS
VDDL
VDDL
5 mA
DC−DC
CONVERTER
CONTROL
VDDL
5 K _{1.2 V}
OSC
VDDH
SS
FB
COMP
CS
OSC
GATE
VDDL
20 mA
nCLASS_AT
ARTN
RTN
Figure 1. NCP1081 Block Diagram
http://onsemi.com
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