DESCRIPTION
2.1 CTRL Pin For some applications, the system requires external programmable protection function. The CTRL pin has two kinds of modes to trigger the protection: high level trigger and low level trigger. The low threshold voltage is 0.5V and high threshold is 2.5V. When the CTRL pin voltage is lower than 0.5V or higher than 2.5V, latch or auto-restart protection will be triggered (different versions of 3105 offer different protection combination, which is shown in Table 2). Version AP3105 VCC OVP Autorecoverable Latch Latch Autorecoverable OLP& FOCP Autorecoverable Autorecoverable Latch Autorecoverable CTRL(low) Latch Latch Latch Autorecoverable CTRL(high) Autorecoverable Latch Latch Latch AP3105V AP3105L AP3105R Table 2. Version Classification of AP3105 OLP & FOCP Table 1. The Difference between AP3103/AP3105 The AP3105 integrates a lot of functions such as the Lead Edge Blanking (LEB) of the current sensing, internal slope compensation and several protection features which include cycle-by-cycle current limit (OCP), fast OCP (FOCP), VCC over voltage protection, OTP, OLP protection.
BCD Semiconductor Manufacturing Limited
