Hi Grzesiek,
1) When the IC is overheated, the OTP pin goes low. One can tie the OTP to the EN pin to disable the pulser. The VSUB current can be as high as 30mA (CW mode, all 8 channels on, 500pF load).
2) There is a software bug. When you select MODE=HI, it's actually set MODE=LO.
Regards,
Charles