Providing isolated feedback in switching power supplies.
The HCPL-1458 stands out in the optoelectronics landscape due to its ability to operate reliably at lower logic levels without compromising data speed. Specification Value Description 3.0V to 5.5V Ideal for both legacy 5V TTL and modern 3.3V CMOS systems. Propagation Delay 35 ns (Typical at 10 kHz)
Assuming your "1458 optocoupler" is a standard DIP-6, here is the pinout (identical to 4N35, PC817, and most general-purpose types):
Found in the high-frequency switching stages of solar inverters, wind power systems, and uninterruptible power supplies (UPS).
The 1458 series optocouplers are typically housed in an 8-pin package. While the pinout can vary slightly depending on whether it's a single, dual-channel, or gate driver version, a common configuration for the single-channel logic output variant (like the HCPL-1458) is as follows:
Drawing not to scale. Typical dimensions:
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Since we are treating "1458" as a placeholder, let us dissect the datasheet of the , one of the most common, general-purpose optocouplers available. If you find a component labeled "1458" in an isolation slot, its electrical characteristics will likely mirror this family.
: Rated for an isolation voltage of 5300 Vrms . Low Power Consumption : Maximum supply current ( ICCcap I sub cap C cap C end-sub
Note: Switching times vary with load resistor and transistor biasing.