- 您现在的位置：买卖IC网 > PDF目录1808 > IR2156STR (International Rectifier)IC BALLAST CONT 600V .5A 14-SOIC PDF资料下载
参数资料
| 型号： | IR2156STR |
| 厂商： | International Rectifier |
| 文件页数： | 17/21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
Functional Description
Under-voltage Lock-out Mode (UVLO)
The under-voltage lock-out mode (UVLO) is defined as the
state the IC is in when VCC is below the turn-on threshold of the
IC. To identify the different modes of the IC, refer to the State
Diagram shown on page 2 of this document. The IR2156
undervoltage lock-out is designed to maintain an ultra low supply
current of less than 200uA, and to guarantee the IC is fully
functional before the high and low side output drivers are
activated. Figure 1 shows an efficient supply voltage using the
start-up current of the IRS2156 together with a charge pump from
the ballast output stage (R SUPPLY , C VCC , D CP1 and D CP2 ).
V BUS (+)
current is available over all ballast operating conditions. An
external bootstrap diode (D BOOT ) and the supply capacitor (C BOOT )
comprise the supply voltage for the high side driver circuitry. To
guarantee that the high-side supply is charged up before the first
pulse on pin HO, the first pulse from the output drivers comes
from the LO pin. During undervoltage lock-out mode, the high-
and low-side driver outputs HO and LO are both low, pin CT is
connected internally to COM to disable the oscillator, and pin
CPH is connected internally to COM for resetting the preheat
time.
Preheat Mode (PH)
The preheat mode is defined as the state the IC is in when
the lamp filaments are being heated to their correct emission
temperature. This is necessary for maximizing lamp life and
reducing the required ignition voltage. The IR2156 enters preheat
mode when VCC exceeds the VCCUV+ positive-going threshold.
R SUPPLY
D BOOT
R LIM
HO and LO begin to oscillate at the preheat frequency with 50%
duty cycle and with a dead-time which is set by the value of the
VCC
14
VB
HO
C BOOT
external timing capacitor, CT, and internal deadtime resistor,
RDT. Pin CPH is disconnected from COM and an internal 4uA
2
13
12
VS
M1
Half-Bridge
Output
current source (Figure 3) charges the external preheat timing
capacitor on CPH linearly. The over-current protection on pin CS
C VCC
11
LO
M2
is disabled during preheat.
C SNUB
V BUS (+)
COM
8
R CS
D CP1
D CP2
RT
4
OSC.
13
HO
M1
V BUS (-)
RT
RPH
RPH
5
S4
Half-
Bridge
Driver
12
VS
Half
Bridge
Output
Figure 1, Start-up and supply circuitry.
CT
6
I LOAD
The start-up capacitor (C VCC ) is charged by current through
supply resistor (R SUPPLY ) minus the start-up current drawn by the
CT
11
LO
M2
IC. This resistor is chosen to provide 2X the maximum start-up
5uA
current to guarantee ballast start-up at low line input voltage.
Once the capacitor voltage on VCC reaches the start-up threshold
VCCUV+, and the SD pin is below VSDTH-, the IC turns on and
CPH
CPH
7
8
COM
RCS
HO and LO begin to oscillate. The capacitor begins to discharge
due to the increase in IC operating current (Figure 2).
V C1
V BUS (-)
Load
Return
V ccuv+
VCCHYS
V ccuv-
C VCC
DISCHARGE
INTERNAL VCC
ZENER CLAMP VOLTAGE
DISCHARGE
TIME
Figure 3, Preheat circuitry
The preheat frequency is determined by the parallel
combination of resistors RT and RPH, together with timing
capacitor CT. CT charges and discharges between 1/3 and 3/5 of
VCC (see Timing Diagram, page 9). CT is charged exponentially
through the parallel combination of RT and RPH connected
internally to VCC through MOSFET S1. The charge time of CT
from 1/3 to 3/5 VCC is the on-time of the respective output gate
CHARGE PUMP
OUTPUT
R SUPPLY & C VCC
TIME
CONSTANT
t
Figure 2, Supply capacitor (C VCC ) voltage.
During the discharge cycle, the rectified current from the
charge pump charges the capacitor above the IC turn-off
threshold. The charge pump and the internal 15.6V zener clamp
of the IC take over as the supply voltage. The start-up capacitor
and snubber capacitor must be selected such that enough supply
17
driver, HO or LO. Once CT exceeds 3/5 VCC, MOSFET S1 is
turned off, disconnecting RT and RPH from VCC. CT is then
discharged exponentially through an internal resistor, RDT,
through MOSFET S3 to COM. The discharge time of CT from 3/5
to 1/3 VCC is the dead-time (both off) of the output gate drivers,
HO and LO. The selected value of CT together with RDT
therefore program the desired dead-time (see Design Equations,
page 12, Equations 1 and 2). Once CT discharges below 1/3
VCC, MOSFET S3 is turned off, disconnecting RDT from COM,
and MOSFET S1 is turned on, connecting RT and RPH again to
VCC. The frequency remains at the preheat frequency until the
voltage on pin CPH exceeds 13V and the IC enters Ignition Mode.
During the preheat mode, both the over-current protection and the
相关PDF资料 |
PDF描述 |
|---|---|
| IR21571STR | IC BALLAST CONTROL INTEG 16-SOIC |
| IR21593STRPBF | IC BALLAST CTLR DIMMING 16-SOIC |
| IR2159STR | IC BALLAST CONTROL DIM 16-SOIC |
| IR2161STRPBF | IC HALOGEN CONVERTER CTLR 8-SOIC |
| IR2166S | IC PFC/BALLAST CONTROL 16-SOIC |
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 |
发布紧急采购，3分钟左右您将得到回复。