NCP1217
Enhanced PWM Current鈭扢ode
Controller for High鈭扨ower
Universal Off鈭扡ine Supplies
Housed in an SO鈭? or PDIP鈭? package, the NCP1217 represents
the enhanced version of the NCP1203鈭抌ased controllers. Thanks to its
high drive capability, NCP1217 drives large gate鈭抍harge MOSFETs,
which together with internal ramp compensation and built鈭抜n
overvoltage protection, ease the design of modern AC/DC adapters.
NCP1217 offers a true alternative to UC384X鈭抌ased designs.
With an internal structure operating at different fixed frequencies
(65鈥?00鈥?33 kHz), the controller features a high鈭抳oltage start鈭抲p
FET, which ensures a clean and loss less start鈭抲p sequence. Its
current鈭抦ode control topology provides an excellent input audio鈭?/div>
susceptibility and inherent pulse鈭抌y鈭抪ulse control. Internal ramp
compensation easily prevents subharmonic oscillations from taking
place in continuous conduction mode designs.
When the current setpoint falls below a given value, e.g. the output
power demand diminishes, the IC automatically enters the so鈭抍alled
skip cycle mode and provides excellent efficiency at light loads.
Because this occurs at a user adjustable low peak current, no acoustic
noise takes place.
The NCP1217 features two efficient protective circuitries: 1) In
presence of an overcurrent condition, the output pulses are disabled
and the device enters a safe burst mode, trying to restart. Once the
default has gone, the device auto鈭抮ecovers. 2) If an external signal
(e.g. a temperature sensor) pulls pin1 above 3.2 V, output pulses are
immediately stopped and the NCP1217 stays latched in this position.
Reset occurs when the V
CC
collapses to ground, e.g. the user unplugs
the power supply.
Features
http://onsemi.com
MINIATURE PWM
CONTROLLER FOR HIGH
POWER AC/DC WALL
ADAPTERS AND OFFLINE
BATTERY CHARGERS
MARKING
DIAGRAMS
8
SO鈭?
D SUFFIX
CASE 751
1
1
17Dyy
ALYW
8
PDIP鈭?
P SUFFIX
CASE 626B
8
1
xxx
yy
1
P1217Pxxx
AWL
YYWW
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Current鈭扢ode with Adjustable Skip鈭扖ycle Capability
Built鈭抜n Internal Ramp Compensation
Auto鈭扲ecovery Internal Output Short鈭扖ircuit Protection
Full Latch鈭扥ff if Adjustment Pin is Brought High
Extremely Low No鈭扡oad Standby Power
Internal Temperature Shutdown
500 mA Peak Current Capability
Fixed Frequency Versions at 65 kHz, 100 kHz and 133 kHz
Direct Optocoupler Connection
Internal Leading Edge Blanking
SPICE Models Available for TRANsient and AC Analysis
High Power AC/DC Converters for TVs, Set鈭扵op Boxes, etc.
Offline Adapters for Notebooks
Telecom DC鈭扗C Converters
All Power Supplies
= Device Code: 065, 100 or 133
= Device Code:
06 for 65
10 for 100
13 for 133
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
Adj 1
FB 2
CS 3
Gnd 4
(Top View)
8
7
6
5
HV
NC
V
CC
Drv
Typical Applications
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
漏
Semiconductor Components Industries, LLC, 2003
1
September, 2003 鈭?Rev. 0
Publication Order Number:
NCP1217/D
NCP1217/D相關(guān)型號(hào)PDF文件下載
-
型號(hào)
版本
描述
廠商
下載
-
英文版
Sub 1.0 V Precision Adjustable Shunt Regulator
ONSEMI
-
英文版
Sub 1.0 V Precision Adjustable Shunt Regulator
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby-Power Offl...
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI [ON...
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI [ON...
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI
-
英文版
Integrated Off-Line Switching Regulator
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON...
-
英文版
Self-Supplied Monolithic Switcher for Low Standby- Power Off...
ONSEMI [ON Semi...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
