參數(shù)資料
型號(hào)： 935083750112
廠商： NXP SEMICONDUCTORS
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PSFM9
封裝： PLASTIC, SIP-9
文件頁(yè)數(shù)： 11/28頁(yè)
文件大小： 240K
代理商： 935083750112
July 1994
19
Philips Semiconductors
Product specication
Multiple output voltage regulator
TDA3602
A reset by the hold function can only be created when the
state control pin remains LOW. This is accomplished by
means of transistor T1 when Port P0,0 is high ohmic.
Because of resistors R2, R3 and R5 the transistor will
switch off when Vignition falls below a level of 5.0 V. During
an engine start, when Vignition reaches voltages as low as
5 V, the transistor will switch off. Regulators 1 and 2 are
already switched of by means of the VP Schmitt-trigger,
causing the HOLD output to go LOW. When Vignition again
increases the transistor will be switched on again (Port
P0,0 has to be open = logic 1), thereby switching the state
control pin to 0 V. As Vignition continues to increase above
7.6 V (Vrise of the VP1 Schmitt-trigger) Regulators 1 and 2
will again switch on causing the HOLD output to go HIGH,
creating a new reset pulse.
The set can also be switched off by opening the ignition
key, causing transistor T1 to switch off. When the ignition
key is closed again, the set will restart to the original
situation that existed before the ignition key was opened.
The charge time of C6 equals 3
× R4 × C6 = 14ms. This is
less than the reset time tresres(rise). To avoid the TDA3602
switching to coma mode before the microprocessor is
awakened, a double function has been given to T1. During
a reset pulse T1 is on (because of resistor R7), thus Vsc will
remain 0 V provided a reset occurs. After the reset pulse
has disappeared, the microprocessor is able to fully
control Vsc by mean of Port P0,0 or Port P1,1.
Security code circuitry
When the set is off and it is pulled out of RETRACK,
×3 and
×4 are disconnected thereby switching the base of
transistor T1 to the output voltage of Regulator 3 (using
resistors R5 and R6). Transistor T1 is starting to conduct
and a RESET pulse is generated. The microprocessor is
activated and checks if Port P1,0 = logic 1. If this is so, the
microprocessor knows that the set is pulled out of
RETRACK and that time is limited to finish the program
correctly (because the microprocessor is operating on the
charge of capacitor C3). The security flag has to be set in
an EEPROM and the microprocessor can switch to
power-down before Regulator 3 switches to power-off.
Another possibility is that the set was running and pulled
out of RETRACK. Now a hold is generated, and the hold
interrupt routine has to check the security in Port P1,0.
R6 is an internal resistor in the microprocessor. An
external resistor limits however the spread.
Bulb circuitry
The lights are switched on provided the RESET output of
the TDA3602 is HIGH. This normally occurs when the set
is switched on. Only at first connection (power-off) will the
RESET output be HIGH when the set is off. In this event
the lights are also switched on. This is not a problem
because the required time for initializing the
microprocessor will be very short.
When a load dump occurs, the RESET output will go LOW,
disabling the lights. With the aid of this feature it is possible
to prevent the light bulbs being damaged at load dump.
Noise.
Regulators 1 and 2 are loaded with a 47
F/16 V load
capacitor because of output noise. With this value the
output noise will be lower than 220
V for Regulator 1 and
lower than 120
V for Regulator 2 (see Table 3 and
associated text).
To minimize the noise on the supply line, capacitors C1
and C2 should be placed as close as possible across the
supply and ground pins of the TDA3602.
Timing diagram
In the timing diagram all of the situations which can occur
are shown (see Fig.12). A HIGH of switch S1 indicates that
S1 is pressed. A HIGH on Port P0,0 indicates that Port
P0,0 is high ohmic (Port P0 is an open-collector output). If
no open-collector output is available another port can be
used, but an extra diode has to be added in series with this
port to prevent T1 being switched on by this port. A HIGH
for the microprocessor indicates that the microprocessor is
operating, a LOW indicates that the microprocessor is in
standby mode.
The following situations are covered in the timing diagram:
1. Initialization of the microprocessor (TDA3602 in
power-off mode)
2. Switching the ignition with the set off (Port P0,0 =
logic 0)
3. Switching the set on/off/on by pressing S1 sequentially
(ignition available)
4. Switching behaviour at engine start and load dump
(set on)
5. Switching the set off and on again by switching the
ignition.
相關(guān)PDF資料
PDF描述
935139740112 DUAL COMPARATOR, 4000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, PDIP8
935172010025 DUAL COMPARATOR, 15000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, UUC
933489560602 DUAL COMPARATOR, 9000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, PDIP8
933880630602 DUAL COMPARATOR, 4000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, PDIP8
933976580602 DUAL COMPARATOR, 9000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
935087-000 制造商:TE Connectivity 功能描述:301A511-51-05/164-0 - Bulk
935087N001 制造商:TE Connectivity 功能描述:301A511-51-05/164-CS7092 制造商:TE Connectivity 功能描述:301A511-51-05/164-CS7092 - Bulk
9350DC-200-0GZZZA 制造商:Siemens 功能描述:
9350DC-200-0ZZZTA 制造商:Siemens 功能描述:
9350DC-200-0ZZZZA 制造商:Siemens 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*