ON Semiconductor NCP5104 User Manual

NCP5104BA36WGEVB
NCP5104 36 W Ballast
Evaluation Board
User's Manual
Introduction
This document describes how the NCP5104 driver can be
implemented in a ballast application. The scope of this
evaluation board user's manual is to highlight the NCP5104
driver and not to explain or detailed how to build electronic
ballast.
The NCP5104 is a high voltage power MOSFET driver
providing two outputs for direct drive of 2 N-channel power
MOSFETs arranged in a half-bridge configuration with only
one input.
It uses the bootstrap technique to insure a proper drive of
the High-side power switch. The driver works with one input
to accommodate half-bridge topology with a fixed dead time
of 520 ns.
Evaluation Board Specification
•
Input Range : 85 Vac − 145 Vac OR 184 Vac − 265 Vac
•
Ballast Output Power : 36 W (type PL−L 36W)
•
Pre-heating Current : 295 mA
•
Pre-heating Time : 1 second
•
Nominal Current : 414 mA
WARNING: BEFORE PLUGGING IN THE EVALUATION BOARD, MAKE SURE THE JUMPER IS IN THE CORRECT POSITION: IF J2
IS USED, THEN V
© Semiconductor Components Industries, LLC, 2012
November, 2012 − Rev. 0
Figure 1. NCP5104 Evaluation Board
MUST BE LOWER THAN 145 Vac.
IN
EVAL BOARD USER'S MANUAL
Detailed Operation
The lamp ballast is powered via a half bridge
configuration. The 2 power MOSFETs are driven with the
NCP5104 driver. The driver is supplied by the V
the high side driver is supplied by the bootstrap diode: when
the low side power MOSFET (Q2) is switched ON, the
BRIDGE pin is pulled down to the ground, thus the capacitor
connected between BRIDGE pin and VBOOT pin is
refuelled via the diode D3 and the resistor R5 connected to
V . When Q2 is switched OFF the bootstrap capacitor C6
CC
supplies the high side driver with a voltage equal to V
level minus the D3 forward voltage diode. Given the
NCP5104 architecture, the driver copies the input signal to
the high side driver, then it generates a fixed dead time
(520 ns) before toggling the low side driver when the input
pin level changes.
1
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rail, and
CC
Publication Order Number:
EVBUM2158/D
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