U243B供应商报价哪里找芯片批发报价原理和应用中文资料-中国IC网-芯三七

U243B

Warning or Car-Direction Indicator

Technology: Bipolar

Features

Can be protected against damage or interference with

a minimum of external circuitry

Voltage dependence of the car indicator lamps also

compensated for lamp failure

Relay output with high-current carrying capacity and

low saturation voltage

Temperature- and voltage-compensated frequency

Warning indication of lamp failure by means of

frequency doubling

Figure 1. Application circuit as a car flasher

(Resistor R₁, R₂and R_t: 1/4 Watt

R₁for protection against continuous reversed polarity: 2 Watt)

Order Information

Extended Type Number

U243B

Package

8 pin dual-inline plastic

8 pin SO plastic

Remarks

U243B-FP

TELEFUNKEN Semiconductors

1 (6)

Rev. A1, 05-Sep-96

Preliminary Information

U243B

Circuit Description

The application circuit shows the operation of the U243B The use of this application circuit ensures damage and

as a car-direction indicator signal generator. The flashing interference protection accordance to VDE 0839. The

frequency is determined by the components R and C , and recognition point for lamp failure can be calculated from

t

the frequency can be calculated from

the control signal threshold, typically 81 mV with

V = 12 V.

S

1

With 81 mV and a measuring resistance of R = 30 m ,

f

(Hz)

3

1

it corresponds to a lamp current of 2.7 A, i.e., the

frequency change-over with a lamp load of 21 W

+ 11.4 W. The variation of the control-signal threshold

with the supply voltage takes into account the PTC char-

R

C

1.5

t

where f is the frequency in normal flashing operation

(basic frequency). The control frequency f is typically

2.2 times the value of f and is the frequency in the case

of lamp failure. The bright periods for f and f are inter-

1

2

acteristic of the filament lamps. A resistance R ≥ 5 k

p

1

between the lamp indicator (49a) and ground (31) ensures

that in case the direction indicator switch is open, the

flashing generator is in stand-by mode.

1

2

nally set in the IC and are 50% for f and 40% for f .

1

2

The resistors R and R are needed to protect the circuit

With a control lamp of max. 4 W between 49 and 49a the

IC still starts with the bright phase.

1

2

against possible damage. An integrated Z-diode in addi-

tion to these external resistors limits the impulse current

in the integrated circuit to ≤ 1.5 A. Connecting the circuit

The arrangement of the supply connections to Pins 2 and

6 must be such as to ensure that, on the connection PCB,

with the wrong polarity leads to current limitation by R ,

1

the resistance of V to Pin 6 is lower than that to Pin 2.

S

R and the resistance of the coil of the relay. A current of

2

about 150 mA would then flow over R , so that for unlim- Defined operation is ensured with a lamp load of

1

ited protection against continuous reversal of the polarity

P

L

10 W or more. Defined operation with lamp loads

of the supply, a 2-W resistor would be necessary. A short ≥ 2 W require an additional external resistance as

circuit between the indicator lamp (49a) and ground (31) described in “Applications”. With considerably reduced

can give rise to a voltage drop of about 4 V across the external circuitry, the integrated circuit U243B can be

measuring resistance, R . The circuit is not damaged by used as an instable multivibrator in the frequency range

3

such a short circuit.

f = 0.05 to 10 Hz.

Absolute Maximum Ratings

Reference point Pin 1

Parameters

Supply voltage

Symbol

V

S

Value

16.5

Unit

V

Pins 2 and 6

Surge forward current

t = 0.1 ms

Pins 2 and 6

Pin 8

I

1.5

1.0

50

A

mA

A

p

FSM

t = 2 ms

p

t = 2 ms

p

Output current

Pin 3

I

0.3

o

Power dissipation

T

= 95°C

= 60°C

DIP8

SO8

DIP8

SO8

P

420

340

690

560

150

mW

°C

amb

tot

P

T

amb

Junction temperature

T

j

Ambient temperature range

Storage temperature range

T

–40 to +95

–55 to +125

°C

amb

stg

2 (6)

TELEFUNKEN Semiconductors

Rev. A1, 05-Sep-96

Preliminary Information

U243B

Electrical Characteristics

Typical values under normal operation in application circuit figure 1, V (+49, Pins 2 and 6) = 12 V

S

Reference point ground (–31), T

= 25°C, unless otherwise specified

amb

Parameters

Supply voltage range

Supply current,

Test Conditions / Pin

Symbol

V (+49)

Min

Typ

9 ... 15

Max

Unit

V

Pins 2 and 6

S

dark phase or stand-by

Supply current,

bright phase

I

4.5

7.0

8

mA

S

Pins 2 and 6

11

Z–diode limitation

I

= 70 mA

V

23

V

S2, 6

S

Relay output,

saturation voltage

I = 150 mA, V = 9 V

Relay output,

reverse current

Pin 3

V

1.0

0.1

V

0

S

O

I

mA

O

Relay coil resistance

R

L

60

Start delay

(first bright phase)

Frequency-determining

resistor

Frequency-determining

capacitor

t

10

510

47

ms

k

on

R

6.8

t

C

F

Frequency tolerance (normal flashing, basic frequency

f not including the tolerance of the external compo-

1

nents R and C )

Bright period

(basic frequency f )

Bright period

∆f

–5

47

+5

53

45

%

1

t

1

2

1

(control frequency f )

37

2

Frequency increase

(lamp failure)

f

2.15 f

2.3f

1

2

1

Control-signal threshold

V = 15 V

Pin 7

V

R3

V

R3

V

R3

85

66

76

91

71

81

97

76

87

mV

S

V = 9 V

S

V = 12 V

S

Transfer resistance

49a to common for

stand-by

R

P

2

5

k

Lamp load

P

L

10

W

Applications

Flashing generator, operation with smaller loads the operating point by 15 mV results in a corresponding

(≥ 2 W)

change of the control signal threshold by 15 mV. For a

lamp current of 2.7 A, a measuring resistance of

By adding a resistor to the application circuit (figure 1),

defined operation with lamp loads ≥ 2 W is possible. The

81 mV – 15 mV

R =

3

= 25 m

results.

voltage drop across the resistor R is generated by the

4

2.7 A

current flowing over the relay and should be about 15 mV.

With a relay current of 150 mA (relay resistance 73 Q),

this requires a resistance of R = 100 m . The change of

4

TELEFUNKEN Semiconductors

3 (6)

Rev. A1, 05-Sep-96

Preliminary Information

U243B

Istable multivibrator

example, 500 (open circuits) and zero current, a voltage

of about 1.4 V remains on the load (for 70 the

The figure shows the minimum of circuitry necessary for

the operation as an instable multivibrator. The circuit is

suitable for frequencies between 0.05 Hz and approxi-

mately 10 kHz. The frequency can be calculated by using

corresponding voltage is about 220 mV). A load of R ≤

L

3.3 k on pin 3 ensures correct operation of the instable

multivibrator. The relationship between the on- and off-

periods can be changed in this circuit by inserting a

the relationship for f given in circuit description. A start-

1

resistor-diode combination parallel to R (see dashed

1

ing resistor of 3.8 k is integrated into the circuit between

pins 8 and 6. This means that, for a load on pin 3 of, for

lines in the figure), e.g., to reduce the “bright”-time.

Figure 2. Flashing generator with small loads

Figure 3. Instable multivibrator for general-purpose applications

Pin Description

Function

5

Function

1

2

3

4

IC ground

R oscillator

t

Supply voltage V

Relay driver

6

Supply voltage V

S

7

Lamp-failure detection

Start input (49a)

C oscillator

t

8

4 (6)

TELEFUNKEN Semiconductors

Rev. A1, 05-Sep-96

Preliminary Information

U243B

Dimensions in mm

Package: DIP8

Package: SO8 (SOT96A)

TELEFUNKEN Semiconductors

5 (6)

Rev. A1, 05-Sep-96

Preliminary Information

U243B

Ozone Depleting Substances Policy Statement

It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to

1. Meet all present and future national and international statutory requirements.

2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems

with respect to their impact on the health and safety of our employees and the public, as well as their impact on

the environment.

It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as

ozone depleting substances (ODSs).

The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and

forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban

on these substances.

TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of

continuous improvements to eliminate the use of ODSs listed in the following documents.

1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively

2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental

Protection Agency (EPA) in the USA

3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.

TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain

such substances.

We reserve the right to make changes to improve technical design and may do so without further notice.

Parameters can vary in different applications. All operating parameters must be validated for each customer

application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized

application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,

directly or indirectly, any claim of personal damage, injury or death associated with such unintended or

unauthorized use.

TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany

Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423

6 (6)

TELEFUNKEN Semiconductors

Rev. A1, 05-Sep-96

Preliminary Information

型号:	U243B
生命周期：	Transferred
IHS 制造商：	TEMIC SEMICONDUCTORS
包装说明：	PLASTIC, DIP-8
Reach Compliance Code：	unknown
风险等级：	5.65
Is Samacsys：	N
商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	R-PDIP-T8
功能数量：	1
端子数量：	8
最高工作温度：	95 °C
最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR
封装形式：	IN-LINE
认证状态：	Not Qualified
最大压摆率：	11 mA
最大供电电压 (Vsup)：	15 V
最小供电电压 (Vsup)：	9 V
表面贴装：	NO
技术：	BIPOLAR
温度等级：	INDUSTRIAL
端子形式：	THROUGH-HOLE
端子位置：	DUAL
Base Number Matches：	1

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