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| 型号： | IRS2530DSTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 16/23页 |
| 文件大小： | 0K |
| 描述： | IC DIMMING BALLAST CTRL 8-SOIC |
| 标准包装： | 1 |
| 系列： | DIM8™ |
| 类型： | 镇流器控制器 |
| 频率： | 34.2 ~ 115 kHz |
| 电流 - 电源： | 5mA |
| 电流 - 输出： | 260mA |
| 电源电压： | 12.6 V ~ 15.6 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 标准包装 |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
| 配用： | IRPLDIM5E-ND - KIT DES BALLAST 4LEVEL DIM FLUOR IRPLDIM4E-ND - KIT DES BALLAST 26W IRS2530D IRPLCFL8U-ND - KIT DES FLUOR BALLAST IRS2530D |
| 其它名称： | IRS2530DSTRPBFDKR |
IRS2530D(S)
that the ignition/preheat ramp will be reset to re-ignite the lamp reliably in case the DC bus decreases too far
and the lamp extinguishes.
LO
HO
L
VS
I
!
I
MLS
!
I
MHS
!
Too close to resonance.
Hard-switching and high
peak MOSFET currents!
Frequency shifted higher
to maintain ZVS.
Figure 5, Non-ZVS protection timing diagram.
Crest Factor Over-current Protection
The IRS2530D uses the VS-sensing circuitry to also measure the low-side half-bridge MOSFET current for
detecting an over-current fault. By using the R DSon of the external low-side MOSFET for current sensing, the
IC eliminates the need for an external current sensing resistor. To cancel changes in the R DSon value due to
temperature and MOSFET variations, the IC performs a crest factor measurement that detects when the
peak current exceeds the average current by a factor of 5.5 (CSCF). Measuring the crest factor is ideal for
detecting when the inductor saturates due to excessive current that occurs in the resonant tank when the
frequency is too close to resonance. During Dim Mode, the crest factor over-current protection is used to
detect if the filaments fail, the lamp is removed, or the lamp becomes deactivated. During each of these fault
conditions, the output stage will transition to a series-LC configuration. The resonant inductor, LRES, and
resonant capacitor, CRES, remain connected together to form a complete circuit due to the voltage-mode
heating configuration to the lamp (see Typical Application Diagram, Page 1). The frequency will move
towards resonance until the inductor saturates. The crest factor protection circuit will then detect the
saturation and the IC will enter Fault Mode and shut down.
Fault Mode and Lamp Reset
During Fault Mode the internal fault latch is set, HO is off, LO is open circuit, and the IC consumes an ultra-
low micro-power current (see State Diagram, Page 11). The IC can be reset with a lamp exchange (as
detected by the LO pin) or a recycling of VCC below and back above the UVLO thresholds. During Fault
Mode, the LO pin is open circuit and is used as an input pin for resetting the IC. If the lamp is removed, the
external pull-up network at the lower lamp filament, RLMP1 and RLMP2 (see Typical Application Diagram,
Page 1), will pull LO above V LOSD+ (8.75V, typical) and the IC will exit Fault Mode and enter UVLO mode.
When the lamp is re-inserted, the lower filament of the lamp will pull LO down below V LOSD- (8.5V, typical)
and the IC will exit UVLO Mode and enter Preheat/Ignition Mode and restart the lamp.
www.irf.com
16
? 2008 International Rectifier
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相关代理商/技术参数 |
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|---|---|
| IRS2530S | 制造商:IRF 制造商全称:International Rectifier 功能描述:DIM8TM DIMMING BALLAST CONTROL IC |
| IRS2538DSPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:Magnetic Replacement Ballast IC |
| IRS2538DSTRPBF | 制造商:International Rectifier 功能描述:MAGNETIC REPLACEMENT BALLAST CONTROL PLUS HALF-BRIDGE DRIVER - Tape and Reel 制造商:International Rectifier 功能描述:IC DIMMING BALLAST CTRL 8-SOIC 制造商:International Rectifier 功能描述:T&R / Magnetic Replacement Ballast Control Plus Half-Bridge Driver |
| IRS2540 | 制造商:IRF 制造商全称:International Rectifier 功能描述:IRPLLED1 High Voltage LED Driver using the IRS2540 |
| IRS25401 | 制造商:IRF 制造商全称:International Rectifier 功能描述:LED BUCK REGULATOR CONTROL IC |
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