STV2145 查看數據表（PDF） - STMicroelectronics

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STV2145

I2C BUS CONTROLLED EAST-WEST AND VERTICAL INTERFACE

STMicroelectronics 

STV2145

Figure 3

VDC

VFUP

S-Correction

Sawtooth

∆VSAW

VFLOW

S_CORRECTION = 1111

Original Sawtooth

(SCOMIN)

S_CORRECTION = 0000

Max. Corrected

Sawtooth (SCOMAX)

∆VSAW

TFMID

Fix Points

Approximative

Line Number 72

Points of

Max. Deviation

127 167 207 262

Figure 4

Figure 5

VSAWB

VMID

VSAW

Vertical

Sawtooth

Figure 6

EWIN

12

5kΩ

100nF

VCC

1kΩ

EWOUT

13

Error Amplifier

STV2145

Test circuit : all measurement values

are related to this test circuit, measured at Pin EWIN.

All East-West values below are depending

on the following settings :

V_AMPLITUDE = (1111111) and no breathing

(Pin BREATH at VCC).

VBRIDGE

(~13V)

RSENS

SENSM

16

SENSP

15

Vertival YOKE

R0

2 x R0

R0

2 x R0

Transconductance

Amplifier

VREF (2 - 3V)

FROUT

14

CSTAB

Vertical

Power

Amplifier

VMID

VSAW

STV2145

CSTAB = 1 to 10nF to guarantee stability (oscillation)

Figure 7

Parabola Outside

of Fix Points

VSENS = VFUP

VPAR

VSENS = 0

(see Note 5)

VSENS = VFLOW

VDC

(Line 167 for 50Hz)

Amplitude defined for the Fix points VFUP and VFLOW

(definition see : vertical ramp generator).

Note : valid for all following definitions of parabola amplitude :

between EW_AMPLITUDE = mon. and max. there is a

linear progression in the amplitude VPAR.

11/17

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