Datenblatt-Suchmaschine für elektronische Bauteile |
|
CA3292A Datenblatt(PDF) 7 Page - Intersil Corporation |
|
CA3292A Datenblatt(HTML) 7 Page - Intersil Corporation |
7 / 10 page 7 RLOAD(max) = [VSUPPLY(min) - VTHD(max)] / ICEX(max) (EQ. 3) RLOAD(max) = (6.5V - 5.5V) / 100µA = 10kΩ (EQ. 4) Since the CA3272A do not have on-chip diodes to clamp voltage spikes which may be generated during inductive switching of the load circuit, an external Zener diode (30V or less is recommended) should be connected between the output terminal and ground. Only those outputs used to switch inductive loads require this protection. Note that since the rate of change of output current is very high, even small values of inductance can generate voltage spikes of consid- erable amplitude on the output terminals which may require clamping. External free-wheeling diodes returned to the sup- ply voltage are generally not acceptable as inductive clamps if the supply voltage exceeds 30V during transients. Typical loads for either the CA3272A or CA3292A are shown in the application circuit of Figure 4A. Where inductive loads are driven from outputs A and B, no external Zener diode clamp is needed for the CA3292A but is required for the CA3272A as shown in Figure 4B. The CA3272A and CA3292A are supplied in specially con- figured power packages to conduct heat from the junction through the mounting structure and device leads to the PC Board. The ground leads are directly connected to the mounting pad of the chip. The junction-to-air thermal resis- tance, θJA may be significantly improved by suitable layout design of the PC board to which the package is soldered. Two or more square inches of PC Board ground area next to the device ground pins is recommended. The PC Board ground layer should be on the device side of the board with open space for heat radiation. Refer to Application Note AN9416 for additional thermal information. Further information is provided on pulse energy calculation methods for inductive load applications with detail explaining the Safe Operating Area shown in Figure 5. The SOA area for single energy transients is below the dot- ted lines for the given ambient temperature conditions. The energy locus plots of the three inductive coils were made for arbitrarily chosen values of inductance and are shown here for reference information. The RL time constant, ambient temperature, clamp voltage and the stored energy in the coil determine the SOA limits. NOTE: The internal drive circuit with self protection and fault output is the CA3292A with the over voltage Zener diode clamp. FIGURE 4A. TYPICAL APPLICATION CIRCUIT SHOWING OUT- PUT LOAD CONTROL CAPABILITY OF THE CA3272A OR CA3292A NOTE: The VCE(SUS) voltage rating is the maximum voltage for full load switching. FIGURE 4B. CA3272A OVER-VOLTAGE PROTECTION IS AN EXTERNAL ZENER DIODE CLAMP WHERE VZ(EXT) ≤ VCE(SUS) FAULT TLIM ILIM OUT A QA ZA FAULT TLIM ILIM OUT B QB ZB FAULT TLIM ILIM OUT C QC ZC FAULT TLIM ILIM OUT D QD ZD HIGH CURRENT HIGH SIDE DR LAMP +VBATT +VBATT +VBATT RELAY SOLENOID CA3292A MOTOR FAULT TLIM ILIM OUT A QA VZ(EXT) +VBATT EXTERNAL ZENER DIODE CLAMP PROTECTION FROM POSITIVE VOLTAGE SPIKE (INDUCTIVE KICK PULSE) AT TURN-OFF INDUCTIVE LOAD CA3272A (1 OF 4 CHANNELS) CA3272A, CA3292A |
Ähnliche Teilenummer - CA3292A |
|
Ähnliche Beschreibung - CA3292A |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |