L9216G 查看數據表（PDF） - Agere -> LSI Corporation

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L9216G

Short-Loop Ringing SLIC with Ground Start

Agere -> LSI Corporation 

Preliminary Data Sheet

September 2001

L9216A/G

Short-Loop Ringing SLIC with Ground Start

Supervision (continued)

Power Ring (continued)

PWM Input Signal and Sine Wave Power Ring Sig-

nal Output (continued)

Modulation waveforms showing PWM are in Figure 14

below.

5 V VCC Operation

A PWM signal was generated with an HP™ 8116

Function Generator modulated with a 20 Hz signal. The

optimal frequency used was 10 kHz. The PWM signal

amplitude was 5.0 V (0 V to 5 V). This signal is shown

in Figure 15.

12-3381(F)

A. Upper = Pwm Signal Centered at 10 kHz

Lower = Modulation Signal

12-3575F

Figure 15. 5 V PWM Signal Amplitude

This input produced 44.96 Vrms ringing signal on

tip/ring under open-loop conditions and 42.0 Vrms was

delivered to 5 REN load. The ringing output on ring,

with VCC = 5 V, is shown in Figure 16.

B. Same as A but Expanded

12-3380(F)

Figure 14. Modulation Waveforms

1660

Notes:

The modulating 20 Hz signal THD was measured at 1.3%.

The tip/ring 20 Hz signal THD was measured at 1%.

VBAT1 = –70.6 V, VBAT2 = –26.5 V, VCC = 5.019 V.

PWM input 10 kHz, 5.0 Vp-p.

R1 = 10 kΩ, C1 = 0.22 µF, C2 = 0.47 µF.

Figure 16. Ringing Output on RING, with VCC = 5 V

Agere Systems Inc.

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