RT3605BE
TONGEN/Driver Interface
The PWM comparator output signal will trigger TONGEN
to generate PWM pulse. The PWM sequence is controlled
by Loop Control. The PWM pulse width is determined by
frequency setting, current balance output and Adaptive
Quick Response (AQR) settings. Once AQR is triggered,
VR will allow all PWM to turn on at the same time. Driver
Interface provides high/low/tri-state to drive external driver.
In power saving mode, Driver Interface forces PWM in tri-
state to turn off high-side and low-side power MOSFET
according to Zero Current Detection output. In addition,
PWM state is controlled by Protection Logic. Different
protections force required PWM state.
OCP
The RT3605BE has sum over-current protection
mechanisms.
OVP
The over-temperature protection threshold is linked to VID,
please refer to classification table and waveform in Table
27 and Figure 27.
UVP
When the output voltage is lower than VID-450mV with
3μs filter time. UVP will be triggered and all PWM will be
in tri-state to turn off high-side powe MOSFETs.
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3605BE-00
December 2019
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
