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参数资料
| 型号： | IR2156STR |
| 厂商： | International Rectifier |
| 文件页数： | 18/21页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONT 600V .5A 14-SOIC |
| 标准包装： | 2,500 |
| 类型： | 镇流器控制器 |
| 频率： | 28 ~ 32 kHz |
| 电流 - 电源： | 1mA |
| 电源电压： | 11.5 V ~ 15.6 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC（窄型） |
| 包装： | 带卷 (TR) |
| 配用： | IRPLCFL4-ND - IC BALLAST DIMMING CFL 3-WAY IRPLCFL3-ND - KIT DESIGN CFL TRIAC DIMMING |
IR2156(S)PbF
DC bus under-voltage reset are enabled when pin CPH exceeds
7.5V.
Ignition Mode (IGN)
The ignition mode is defined as the state the IC is in when a
high voltage is being established across the lamp necessary for
igniting the lamp. The IR2156 enters ignition mode when the
voltage on pin CPH exceeds 13V.
V BUS (+)
DC Bus Under-voltage Reset
Should the DC bus decrease too low during a brown-out
line condition or over-load condition, the resonant output stage to
the lamp can shift near or below resonance. This can produce
hard-switching at the half-bridge which can damage the half-
bridge switches. To protect against this, pin VDC measures the
DC bus voltage and pulls down on pin CPH linearly as the voltage
on pin VDC decreases 10.9V below VCC. This causes the p-
channel MOSFET S4 (Figure 4) to close as the DC bus
decreases and the frequency to shift higher to a safe operating
point above resonance. The DC bus level at which the frequency
VCC
2
S1
shifting occurs is set by the external RBUS resistor and internal
RVDC resistor. By pulling down on pin CPH, the ignition ramp is
RT
RPH
RT
RPH
CT
4
5
6
S4
OSC.
Fault
Logic
Half-
Bridge
Driver
13
12
HO
VS
M1
Half
Bridge
Output
I LOAD
also reset. Therefore, should the lamp extinguish due to very low
DC bus levels, the lamp will be automatically ignited as the DC
bus increases again. The internal RVDC resistor is connected
between pin VDC and COM when CPH exceeds 7.5V (during
preheat mode).
CT
S3
11
LO
M2
Fault Mode (FAULT)
1.25V
10
CS
Should the voltage at the current sensing pin, CS, exceed
CPH
7
5uA
Comp4
R1
CCS
RCS
1.3V at any time after the preheat mode, the IC enters fault mode
and both gate driver outputs, HO and LO, are latched in the ‘low’
CPH
8
COM
state. CPH is discharged to COM for resetting the preheat time,
Load
Return
V BUS (-)
Figure 4, Ignition circuitry.
Pin CPH is connected internally to the gate of a p-channel
MOSFET (S4) (see Figure 4) that connects pin RPH with pin RT.
As pin CPH exceeds 13V, the gate-to-source voltage of MOSFET
S4 begins to fall below the turn-on threshold of S4. As pin CPH
continues to ramp towards VCC, switch S4 turns off slowly. This
results in resistor RPH being disconnected smoothly from resistor
RT, which causes the operating frequency to ramp smoothly from
the preheat frequency, through the ignition frequency, to the final
run frequency. The over-current threshold on pin CS will protect
the ballast against a non-strike or open-filament lamp fault
condition. The voltage on pin CS is defined by the lower half-
bridge MOSFET current flowing through the external current
sensing resistor RCS. The resistor RCS therefore programs the
maximum allowable peak ignition current (and therefore peak
ignition voltage) of the ballast output stage. The peak ignition
current must not exceed the maximum allowable current ratings of
the output stage MOSFETs. Should this voltage exceed the
internal threshold of 1.3V, the IC will enter FAULT mode and both
gate driver outputs HO and LO will be latched low.
Run Mode (RUN)
Once the lamp has successfully ignited, the ballast enters
run mode. The run mode is defined as the state the IC is in when
the lamp arc is established and the lamp is being driven to a given
power level. The run mode oscillating frequency is determined by
the timing resistor RT and timing capacitor CT (see Design
Equations, page 12, Equations 3 and 4). Should hard-switching
occur at the half-bridge at any time due to an open-filament or
lamp removal, the voltage across the current sensing resistor,
RCS, will exceed the internal threshold of 1.3 volts and the IC will
enter FAULT mode. Both gate driver outputs, HO and LO, will be
latched low.
18
and CT is discharged to COM for disabling the oscillator. To exit
fault mode, VCC must be recycled back below the UVLO
negative-going turn-off threshold, or, the shutdown pin, SD, must
be pulled above VSDTH+. Either of these will force the IC to enter
UVLO mode (see State Diagram, page 2). Once VCC is above
VCCUV+ and SD is below 4.5V, the IC will begin oscillating again
in the preheat mode.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR2156STRPBF | 功能描述:功率驱动器IC Ballast Cntrl Prog Preht Tm & Run Freq RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR2157 | 制造商:IRF 制造商全称:International Rectifier 功能描述:FULLY INTEGRATED BALLAST CONTROL IC |
| IR2157_07 | 制造商:IRF 制造商全称:International Rectifier 功能描述:FULLY INTEGRATED BALLAST CONTROL IC |
| IR21571 | 功能描述:IC BALLAST CONTROL 16-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| IR21571PBF | 功能描述:功率驱动器IC Ballast Cntrl Thrml Ovrload Prot RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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