TPS61161DRVR BZR LED Driver for Antminer L3+ Hashboard

TPS61161DRVR BZR LED Driver | Boost Converter with PWM Dimming for Antminer L3+ Hashboard Repair

The TPS61161DRVR is a high-efficiency boost (step-up) LED driver IC with an integrated 40V switching FET, used on Antminer L3+ hashboards to drive the indicator / backlight LED string. When this driver fails, the visible chain indicator goes dark — the symptom looks cosmetic but actually breaks the on-board diagnostic feedback the operator relies on to spot a sick board at a glance.

Headline specs for hashboard LED duty: 2.7V–18V input range, up to 38V output, 700mA switch current, 600kHz switching frequency, and built-in support for both PWM and digital dimming on the same pin. Compact WDFN-6 package with exposed pad for thermal management on the dense L3+ hashboard layout.

When to Replace the TPS61161DRVR

• Antminer L3+ chain indicator LEDs dead — boost driver open or shorted on output, no current to the LED string.
• LEDs flicker or stuck at full brightness — dimming control input degraded, PWM no longer modulating.
• Visible damage on the WDFN-6 package — burnt or cracked after an inductor failure or downstream short.
• Hashboard backlight intermittent — driver entering thermal shutdown under sustained load.
• Adjacent inductor or boost diode also failed — replace the full boost stage together to avoid repeat failure.

TPS61161DRVR Specifications

FAQ — TPS61161DRVR LED Driver

Q: How do I confirm the LED driver is the failed part vs the LED string?
A: Power off. Check the LED string with a DMM diode-test mode — healthy LEDs each show ~2-3V forward drop. If the LEDs test OK individually but the string is dark when powered, the driver is the failure. If one or more LEDs are short / open, fix the LED string first or the new driver will fail trying to push current through a shorted load.

Q: PWM vs digital dimming — what's the difference?
A: Same control pin, two modes. Apply a PWM signal for traditional duty-cycle dimming. Apply specific digital pulse patterns for the digital dimming mode. The L3+ hashboard firmware typically uses PWM — match the original control signal type before re-energising.

Q: WDFN-6 rework profile?
A: The exposed pad on the WDFN-6 carries most of the heat — bottom-side preheat 130–150°C, top-side hot air 320°C with flux paste. After reflow, the exposed pad must connect to the board's thermal copper for proper heat sinking. X-ray inspection if available.

Q: Bulk pricing for L3+ repair benches?
A: Yes — email contact@lys-sz.com for reel-quantity TPS61161DRVR pricing.

Related products

• TPS61170DRVR BZS Boost Converter 1.2A (Avalon 1066)
• SGM6612A 20V Synchronous Boost Converter (Avalon)
• LTC3807EUDC Buck Regulator (Antminer L3+ hashboard)
• L3+ / S9 Boost Module 14V (6R8 RT8537)

Antminer L3+ repair benches stocking TPS61161DRVR drivers by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.