TP4056 Thermal Budget and Charge-Current Setting
One resistor sets the current, but input voltage and copper decide the temperature. The arithmetic, the derating table, and why 1 A often becomes 0.5 A.
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Chip-seek Blog
Technical knowledge, market intelligence, and practical guidance for semiconductor procurement.
How to Reduce Electronic Component Procurement Costs for EMS Production
The lowest IC unit price doesn't always mean the lowest procurement cost. Discover how EMS and PCBA buyers can evaluate landed costs, MOQ, reel packaging, BOM consolidation, and supplier requirements...
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I2C Pull-Up Resistors: Fix 100 kHz and 400 kHz Errors
Calculate I2C pull-up limits, understand why 4.7 kOhm may fail at 400 kHz, and diagnose parallel module pull-ups, slow edges and voltage-domain mistakes.
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LM358 Alternatives: Dual Op-Amp Cross-Reference
The dual op-amp in a million low-cost designs: why its input range is wider than its output range, and what breaks when you swap it.
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AMS1117 Thermal Budget: Junction Temperature at 5 V and 12 V
The AMS1117 is rated 1 A, but at 12 V input the thermal limit arrives near 0.19 A. Here is the arithmetic, the derating curves, and the fix.
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Week 44 Category Watch: LDO Takes the Top Spot
Week 44 brought a broad cool-off: LDO overtook 32-bit MCU as the top category, while global spot inventory kept building to 7.32 billion units.
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Week 44 Brand Watch: TI Gains, MCU Brands Cool
Eight of nine tracked brands lost search volume last week. The one that gained did it on automotive LED drivers.
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Electronic Components Market Watch: Week 43
Week 43 component rankings show MCU search interest and sharp price and listed-inventory swings. Here's what buyers should verify before changing a BOM or purchase plan.
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Week 44 Supply Watch: Automotive LED Drivers Surge
Week 44 put automotive lighting, isolated interfaces and precision analog at the top of the search and price boards. What buyers should do next.
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Component RFQ Checklist: Compare Quotes Before You Buy
Make IC supplier quotes comparable before choosing a price. Align full MPNs, carrier formats, stock evidence, delivery milestones and commercial conditions.
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NE555 Alternatives: Bipolar vs CMOS Timers
The same eight pins, two very different chips inside: why a 555 replacement can double your standby current or halve your output drive.
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STM32F103CBT6 Alternatives: 128 KB Flash MCU Guide
The same die, the same 48-pin footprint, twice the flash — and the firmware work most people forget before they swap.
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