NCP1028LEDGEVB ON Semiconductor, NCP1028LEDGEVB Datasheet - Page 13
![EVAL BOARD FOR NCP1028LEDG](/photos/28/39/283973/ncp1028ledgevb_sml.jpg)
NCP1028LEDGEVB
Manufacturer Part Number
NCP1028LEDGEVB
Description
EVAL BOARD FOR NCP1028LEDG
Manufacturer
ON Semiconductor
Specifications of NCP1028LEDGEVB
Design Resources
NCP1028LEDGEVB BOM CP1028LEDGEVB Gerber Files NCP1028LED EVB Schematic
Current - Output / Channel
720mA
Outputs And Type
1, Isolated
Voltage - Output
18V
Voltage - Input
90 ~ 265VAC
Utilized Ic / Part
NCP1028
Core Chip
NCP1028
Topology
Flyback
No. Of Outputs
1
Output Current
720mA
Output Voltage
18V
Development Tool Type
Hardware - Eval/Demo Board
Leaded Process Compatible
Yes
Mcu Supported Families
NCP1028
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
NCP1028LEDG
Other names
NCP1028LEDGEVBOS
Fault Condition – Output Short-Circuit
internally enabled. If everything is correct, the auxiliary
winding increases the voltage on the V
voltage rises. During the start-sequence, the controller
smoothly ramps up the peak current to Imax setting, e.g.
Ipeak_HI, which is reached after a typical period of 1.0 ms.
As soon as the peak current setpoint reaches its maximum
(during the startup period but also anytime an overload
occurs), an internal error flag is asserted, Ipflag, indicating
As soon as V
Figure 26. In case of short-circuit or overload, the NCP1028 protects itself and the power supply via a low
frequency burst mode. The V
CC
reaches VCC
ON
CC
CC
, drive pulses are
pin as the output
is maintained by the current source and self-supplies the controller.
http://onsemi.com
NCP1028
13
that the system has reached its maximum current limit set
point (Ip = Ip max). The assertion of this flag triggers a
55 ms counter. If at counter completion Ipflag remains
asserted, all driving pulses are stopped and the part stays off
during eight periods of 55 ms (440 ms). A new attempt to
restart occurs and will last 55 ms providing the fault is still
present. If the fault still affects the output, a safe burst mode
is entered, affected by a low duty-cycle operation (11%).
When the fault disappears, the power supply quickly
resumes operation. Figure 26 depicts this particular mode.