BP1808 / BP2832A / BP2831A LED Backlight Driver IC — SOP-8, Boost, PWM Dimming (5-Pack)

BP1808 / BP2832A / BP2831A LED Backlight Driver IC — SOP-8, Boost, PWM Dimming (5-Pack)

The BP1808, BP2832A, and BP2831A are SOP-8 boost-topology LED backlight driver ICs widely used in LCD monitor, laptop, and LED TV power board repair. They integrate a current-mode PWM boost controller with constant-current LED string output, PWM dimming input, and full protection (OVP, OCP, thermal shutdown, open/short LED detection) in a single compact package.

Key Specifications

Parameter	Value
Package	SOP-8 (SMD)
Topology	Boost converter, current-mode PWM
Dimming	PWM input (100Hz–1kHz)
Switching Frequency	~200kHz typical
Protection	OVP, OCP, thermal shutdown, open/short LED
Output	Constant-current LED string
Quantity	5 pieces

Variant Comparison

Part Number	Key Feature	Best For
BP1808	Standard boost LED driver	General LCD backlight repair
BP2832A	Enhanced OVP, wider input range	19–27" LCD monitor repair (most common)
BP2831A	Lower quiescent current	Energy-efficient LED driver designs

Why Choose BP1808 / BP2832A / BP2831A?

• Integrated boost + constant-current driver — no external PWM controller needed, minimal BOM
• PWM dimming input — directly compatible with LCD controller board dimming signals
• Full protection suite — OVP/OCP/thermal/open-LED prevents cascade failure during repair
• SOP-8 footprint — direct drop-in replacement on existing LCD power board layouts
• 5-pack value — sufficient for multiple LCD repair jobs and prototyping

Compatible With / Common Repair Applications

• LCD monitors: 19–27 inch LED-backlit panels (Samsung, LG, AOC, Dell power boards)
• Laptop LCD backlight: Replacement for failed backlight driver on laptop inverter boards
• LED TV power board: Backlight boost stage repair (32–42 inch panels)
• DIY LED driver PCB: Constant-current LED string driver for custom lighting projects
• Programmer/tester tools: CH341A for reading original IC markings before replacement

Frequently Asked Questions

Q: How do I identify which variant (BP1808, BP2832A, or BP2831A) is on my LCD board?
A: Read the markings on the original failed IC under magnification. BP2832A is the most common in 19–27" LCD monitors and is the recommended replacement for BP1808 in most repair scenarios. Always verify pinout against the datasheet before substituting.

Q: What causes LED backlight driver ICs to fail in LCD monitors?
A: The most common cause is an open-circuit LED string — when one LED in the string fails open, OVP triggers repeatedly, stressing the driver IC until it fails. Always test all LED strings for continuity before replacing the driver IC, or the new IC will fail again.

Q: Can I use BP2832A for a new LED driver design (not repair)?
A: Yes. The reference circuit requires an external boost inductor (typically 47–100μH), output capacitor, current-sense resistor (sets LED current), and feedback resistor divider. The PWM dimming pin accepts a 100Hz–1kHz signal from an MCU GPIO for brightness control.

Package Contents

• 5× BP1808 / BP2832A / BP2831A LED Backlight Driver IC (SOP-8) — variant as selected

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