|
|
Part: IRPLLNR1
Category:
Others
Description: Powirlight(tm) Reference Design: Linear Ballast
Company: International Rectifier Corp.
Datasheet: Download IRPLLNR1 datasheet File size : 52 kB
Request For quote: Find where to buy IRPLLNR1
Datasheet text preview:
Reference Design Data Sheet (April, 1997)
IRPLLNR1
POWIRLIGHT REFERENCE DESIGN : LINEAR BALLAST
Features
ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ Drive 2X32WT8 or 2X40WT12 Universal Input (90-275Vac) High Power Factor (0.99) & Low THD High-Frequency Operation (50kHz) Cathode Preheating (60kHz) Lamp Fault Protection with Auto-Restart Over Temperature Protection IR2153 HVIC Ballast Controller
TM
Description
The IRPLLNR1 is a high efficiency, high power factor, non-dimmable electronic ballast designed for linear fluorescent lamp types. The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR2153 for managing the lamp. Other features include EMI filtering, transient protection and lamp fault protection. The IRPLLNR1 is intended as a reference design to be used as development tool to speed up customers' time to market.
Block Diagram
EMI Filter Rectifier PFC Boost Converter IR2153 HalfBridge Lamp Resonant Circuit
AC In
Fault Detection
Reference Design Data Sheet intended for design information only. Subjected to changes without prior notice.
1
IRPLLNR1
Electrical Characteristics
Parameter Units Value Lamp Type 2/32T8 2/40T12 Input Power [W] 65 80 Input Current (120VAC) [A] 0.55 0.67 Pre-heat Output Frequency [kHz] 60 45 Pre-heat Output Voltage [Vp] 300 300 Pre-heat Time (TTL) [s] 1.0 2.0 Running Output Frequency [kHz] 50 35 Running Output Voltage [V] 100 100 Input A.C. Voltage Range [VAC] 90..275VAC/50/60Hz Input D.C. Voltage Range [VDC] 100..350 Temperature Range [ēC] 0..70 Power Factor 0.99 Total Harmonic Distortion [%] <15% Maximum Output Voltage [Vp] 650 Note: Each lamp type requires a new ballast type with different component values as listed in the Bill of Materials.
Lamp Fault Protection Characteristics
Fault Conditions (one or both lamps) Upper cathode out or broken Ballast Lamp 2 continues running, or, deactivates if total load current not enough to commutate snubber (non zero-voltage switching) Deactivates Deactivates Deactivates Deactivates Restart Operation Lamp exchange
Lower cathode out or broken Broken tube (cathodes intact) End-of-life Short-Circuited
Lamp exchange Lamp exchange Lamp exchange Lamp exchange
Reference Design Data Sheet intended for design information only. Subjected to changes without prior notice.
2
IRPLLNR1
Functional Description
Overview The IRPLLNR1 consists of a power factor front end, a ballast control section, a resonant lamp output stage and shutdown circuitry. The power factor controller is a boost converter operating in critically continuous, free-running frequency mode. The ballast control section provides frequency modulation control of a traditional RCL series-parallel lamp resonant output circuit and is easily adaptable to a wide variety of lamp types. The shutdown section consists of lamp circuit current detection and comparator logic for safe turn-off and smooth auto re-starting. All functional descriptions are referred to the IRPLLNR1 schematic. Power Factor Control The power factor controller section consists of the LinFinity LX1562 Power Factor Controller IC (IC1), MOSFET M1, inductor L3, diode D5, capacitor C8 and additional biasing, sensing and compensation components (see schematic). This IC was chosen for its minimal component count, low start-up supply current and robust error amplifier. This is a boost topology designed to step-up and regulate the output DC bus voltage while drawing sinusoidal input current from the line (low THD) which is "in phase" with the AC input line voltage (HPF). The charging current of L3 is sensed in the source of M1 (R7) and the zero-crossing of the inductor current, as it charges the DC bus capacitor C8, is sensed by a secondary winding on L3. The result is critically continuous, free-running frequency operation where: L3 =
2 Vin (Vout - 2Vin ) 2 Pout Vout f s
[1]
I Lp = where, V in Vout Pout fs = = = = =
Pout 2 2 Vin min
[2]
efficiency nominal AC input voltage DC bus voltage lamp power switching frequency
The value of the boost inductor (L3) can be calculated and the core should be dimensioned to handle the associated inductor peak currents ( I L p ) for the desired range of AC input voltage.
Reference Design Data Sheet intended for design information only. Subjected to changes without prior notice.
3
Others parts begin by ir
IR-1 IR-2 IR-3 IR-4 IR-5 IR-6 IR-7 IR-8 IR-9 IR-10 IR-11 IR-12 IR-13 IR-14 IR-15 IR-16 IR-17 IR-18 IR-19 IR-20 IR-21 IR-22 IR-23 IR-24 IR-25 IR-26 IR-27 IR-28 IR-29 IR-30 IR-31
|
|
|
