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參數(shù)資料
| 型號： | U6432B |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Low-power Flasher IC with 18-mOMShunt |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 207K |
| 代理商： | U6432B |
4
U6432B
4725A–AUTO–06/03
Functional Description
Pin 1, GND
The U6432B is protected against damage in case of battery reversal via resistor R
4
to
ground (-31). An integrated protection circuit together with external resistances R
2
and
R
4
limits the current pulses in the IC.
Pin 2, Supply Voltage,
V
S
power
The arrangement of the supply connections to Pin 2 (and 6) must be so as to ensure
that on the connection printed circuit board (PCB), the resistance of V
S
to Pin 6 is lower
than that to Pin 2.
Pin 3, Relay Control
Output (Driver)
The relay control output is a high-side driver with a low saturation voltage. It is capable
of driving a typical automotive relay with a minimum coil resistance of 60 .
Pin 4 and 5, Oscillator
The flashing frequency, f
1
, is determined by the R
1
C
1
components as given by the for-
mula below (see Figure 1):
where C
1
47 μF, R
1
= 6.8 k to 510 k
In case of a lamp outage (see Pin 7) the oscillator frequency is switched to the lamp out-
age frequency f
2
with f
2
2.2 f
1
.
Duty cycle in normal flashing mode: 50%
Duty cycle in lamp outage mode: 40% (bright phase)
Pin 6, Supply Voltage,
Sense
For accurate monitoring via the shunt resistor, a minimized layer resistance from point
V
S
/shunt to Pin 6 is recommended.
Pin 7
Control Signal Threshold
(49 mV Comparator)
The detection point for lamp failure can be calculated from the control signal threshold,
typically 49 mV with V
S
= 12 V. With a measuring resistance of R
3
= 18 m , the fre-
quency change-over is reached at a lamp load of 21 W + 11.4 W. The variation of the
control signal threshold supply voltage takes into account the PTC characteristic of fila-
ment lamps.
Control Signal Threshold 2
(15-mV Comparator)
A voltage drop at the shunt resistor R
3
between 49 mV and 15 mV lets the flasher work
in frequency doubling mode.
If the voltage drop decreases to a value below V
R3MAX
= 15 mV, frequency doubling is
disabled.
This can be achieved either with a switch which by-passes the shunt resistor (e.g., a
special hazard warning switch) or with a small lamp load.
Flasher operation starts with a lamp load of P
L
1 W.
f
1
R
1
C
1
1.5
----------------------------------
Hz
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| U6432B_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low-power Flasher IC with 18-mOHM Shunt |
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| U6432B-MFP | 功能描述:IC FLASHER LOW PWR W/SHUNT 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| U6432B-MFPG3 | 功能描述:IC FLASHER LOW PWR W/SHUNT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
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