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7

Output Measurement

A sample of input LED signals and various output waveforms are captured and shown in Figure 6. The default setup 

connection is adopted, but with Q1a and Q1b switchers mounted. The switchers have a gate capacitance equivalent to 

10 nF.

Figure 6. Input LED signals and switchers’ gate voltage waveforms

Note: Both IN1+ and IN2+ are set at 49% duty ratio.

Figure 7 shows the turn-off gate signal of Q1a and the turn-on gate signal of Q1b:

Figure 7. Turn-off and Turn-on Gate waveforms of Q1a and Q1b

Summary of Contents for ACNT-H313

Page 1: ...eeded to generate the bias current across D5 3 The S1 jumper is shorted by default to connect VE to VEE assuming that a negative supply is not needed Note If a negative supply is needed then the S1 ju...

Page 2: ...crocontroller output to drive the lower arm of the half bridge inverter b Another 10 kHz 5 V DC pulse at 180 out of phase to 3a from the dual output signal generator across IN2 and IN2 pins of CON1b t...

Page 3: ...3 Schematics Figure 3 shows the schematics of the evaluation board Figure 3 Schematics of ACNT H313 evaluation board...

Page 4: ...pins IN2 and IN2 of CON1b of the top inverter arm isolated driver 4 Use a multi channel digital oscilloscope to capture the waveforms at the following points a LED signal at IN1 pin w r t IN1 for the...

Page 5: ...market Each of the ACNT H313 evaluation boards as shown in Figure 5 accommodates two units of ACNT H313 ICs Therefore each board is enough to drive the top and bottom arms of the half bridge inverter...

Page 6: ...signal input 1 If you require details of bootstrapping operation contact Avago Scheme 3 is similar to Scheme 1 it uses two external isolated supplies at VCC2a and VCC2b Scheme 3 however has the advan...

Page 7: ...ed but with Q1a and Q1b switchers mounted The switchers have a gate capacitance equivalent to 10 nF Figure 6 Input LED signals and switchers gate voltage waveforms Note Both IN1 and IN2 are set at 49...

Page 8: ...the turn off gate signal of Q1b Figure 8 Turn on and turn off gate waveforms of Q1a and Q1b Figure 7 and Figure 8 show that the turn off speed of the switchers is about 200 ns due largely to the capac...

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