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参数资料
| 型号： | IR2159STR |
| 厂商： | International Rectifier |
| 文件页数： | 16/25页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONTROL DIM 16-SOIC |
| 标准包装： | 2,500 |
| 类型： | 镇流器控制器 |
| 频率： | 25 ~ 95 kHz |
| 电流 - 电源： | 10mA |
| 电源电压： | 12.5 V ~ 15.6 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 带卷 (TR) |
IR2159/IR21591 (S)
-60.0
-65.0
-70.0
-75.0
-80.0
-85.0
-90.0
The start-up capacitor (C1) is charged by current
through resistor (R1) minus the start-up current
drawn by the IC. This resistor is typically chosen
to provide 2X the maximum start-up current at
low line to guarantee start-up under the worst case
condition. Once the capacitor voltage reaches the
start-up threshold, and, the voltage on pin VDC is
above 5.1V (see Brown-out Protection), the IC
turns on and HO and LO begin to oscillate. The
capacitor begins to discharge due to the increase
in IC operating current (Figure 6).
V C1
0
5
10
15
Lamp Pow er [Watts]
20
25
30
C1
DISCHARGE
INTERNAL
CLAMP VOLTAGE
V UVLO+
Figure 4, Lamp power vs. phase of output stage.
VHYST
Under-voltage Lock-Out (UVLO)
V UVLO-
DISCHARGE
TIME
CHARGE PUMP
The IR2159 undervoltage lock-out is designed to
maintain an ultra low quiescent current of less
than 200uA, while guaranteeing the IC is fully
functional before the high and low side output
drivers are activated. Figure 5 shows an efficient
supply voltage using the start-up current of the
IR2159 together with a charge pump from the
ballast output stage (R1, C1, C2, D1 and D2).
V BUS (+)
Rectified
OUTPUT
R1 & C1 TIME
CONSTANT
t
Figure 6, Start-up capacitor (C1) voltage.
During the discharge cycle, the rectified current
from the charge pump charges the capacitor above
the minimum operating voltage of the device and
the charge pump and internal 15.6V zener clamp
AC Line
CVDC
R3
VDC
1
RVDC
HO
16
15 VS
VB
14
13 VCC
COM
12
11 LO
R1
C3
D3
C1
D1
Q1
Q2
Half-Bridge
Output
C2
of the IC take over as the supply voltage. The
start-up capacitor and snubber capacitor must be
selected such that worst case IC conditions are
satisfied. A bootstrap diode (D3) and supply
capacitor (C3) 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
RCS
V BUS (-)
Figure 5, Typical application of start-up circuitry.
16
D2
drivers comes from the LO pin. During UVLO,
the high and low side driver outputs are low, pin
VCO is pulled-up internally to 5V resetting the
starting frequency to the maximum, and pin CPH
is short-circuited internally to COM resetting the
preheat time.
www.irf.com
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相关代理商/技术参数 |
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| IR2161 | 制造商:International Rectifier 功能描述: |
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