TEA2164S 查看數據表（PDF） - STMicroelectronics

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TEA2164S

SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT

STMicroelectronics 

TEA2164S

Figure 2 : Substrat Biasing

Vsubstrat = V-

V-

V+

IB > 0

12 13 15

IB > 0

TEA2164S 14

145

IB < 0

V-

IB < 0

or

Vsubstrat = 0

V+

IB > 0

12 13 15

IB > 0

TEA2164S 14

145

IB < 0

IB < 0

Capacitive

Coupling

ELECTRICAL OPERATING CHARACTERISTICS

Tamb = 25oC, VCC = 10V, VCC- = 0V, potentials referenced to ground (Pin 1)

(unless otherwise specified)

Symbol

Parameter

Min. Typ. Max. Unit

POWER SUPPLY

VCC (start)

VCC (stop)

∆VCC

Starting Voltage (VCC increasing)

Stopping Voltage (VCC decreasing)

Hysteresis (VCC start – VCC stop)

Vccmax

Iccstart

Overvoltage Lock-out

Starting Positive Supply Current

CURRENT LIMITATION AND PROTECTION (Pin 11)

8

9

9.6

V

5

6.2

7.4

V

2

2.8

3.5

V

14.8 15.5 16.2

V

0.5

0.8

1.5

mA

VCM1

VCM2

∆VCM

Pulse by Pulse Current Limitation Threshold (see Note)

TEA2164SL (Low range)

TEA2164SH (high range)

Current Monitoring 2nd Threshold

∆VCM = VCM2 – VCM1 (L or H)

-1 -0.925 -0.825 V

-0.875 -0.775 -0.700 V

1200 1350 1500 mV

300 500 700 mV

REPETITIVE OVERCURRENT PROTECTION

VCM3

VCM3 - VCM1

VC2

I3 disch

I3 ch.

Repetitive Overcurrent Threshold (Pin 11)

VCM3 - VCM1 (L or H)

Lock-out Voltage on Pin 3

Capacitor C2 Discharge Current (synchronized mode)

Capacitor C2 Charge Current

-1.1 -0.9 -0.7

V

-0.16 0.05 0.16

V

2.4

3

3.6

V

10

20

30

µA

50

80

110

µA

OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION

To

Ton(max)

Tsyn

TO

Oscillator Initial Accuracy (RT = 50kΩ, CT = 1nF)

Maximum Duty Cycle (Tsyn = 1.05 To)

Synchronization Window

19.3

21

22.7

µs

60

70

85

%

1.0

1.5

OUTPUT STAGE

I14/I2

IBON

Ic Copy Current Gain

Base Current Starting Pulse

VERY LOW FREQUENCY OSCILLATOR

1000

300

mA

Burst Duty Cycle

13

%

Note : For the best accuracy of VCM1 value the TEA2164S is marked as follows : TEA2164SL (low range) or TEA2164SH (high range).

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