Highway 09 Ic — Datasheet [extra Quality]
Highway 09 IC Datasheet & Notes | PDF | Engineering - Scribd
If the LED string is shorted, the sense resistor sees full current. The IC will attempt to regulate, but the voltage across the pass transistor becomes V_IN (e.g., 14.4V). Power dissipation spikes, triggering OTP within milliseconds. The IC enters a "hiccup" mode (on/off cycling) until the short is removed.
A: Yes, technical information, cross-references, and application notes are available on various database sites like Scribd and DatasheetArchive .
The Highway 09 is engineered for applications requiring precise current regulation and robust fault protection. It integrates a high-voltage power MOSFET, a pulse-width modulation (PWM) controller, and multiple safety diagnostics onto a single silicon substrate. Core Benefits
: It directly reads signals from touch buttons, controls LED displays via I2C, and generates the precise Pulse Width Modulation (PWM) signals needed to switch the main IGBT at high frequencies (typically 20-50kHz). It also monitors AC mains voltage (Pin 16), ensures the resonant circuit is synchronized (Pins 4 and 15), and constantly checks for dangerous over-current or surge conditions (Pin 1) to turn off the IGBT if needed. highway 09 ic datasheet
signal traces strictly as a differential pair. Match trace lengths identically, maintaining constant trace impedance (typically 120 ohms differential) and isolating them from noisy digital switching nets.
Unregulated DC +----->|-----+-----> +9V Regulated DC (12V to 25V) | 7809 | + -------------+ Pin1 Pin3 +-------------+ | | | Pin2 Pin2 Pin2 | | | - -------------+------+--------------------+----- GND
A vital safety feature that monitors current through the primary winding. If it detects a surge beyond safe thresholds, it triggers an immediate shutdown to prevent hardware failure.
A: The chip uses the I²C protocol to talk to the user interface. While you can't reprogram it, you can monitor the I²C bus to intercept data from a working unit. For advanced users, using an ESP32 to listen to this traffic may allow it to simulate commands and control the hardware without fully reverse-engineering it. Highway 09 IC Datasheet & Notes | PDF
Primary DC supply voltage input from the battery or main bus.
High integration reduces external component count, saving PCB space.
For detailed electrical characteristics and implementation guides, you can refer to databases such as DatasheetArchive or product listings from retailers like AliExpress Are you looking to use this IC for a new design replacement part for a specific appliance repair? 1PCS HIGHWAY09A HIGHWAY09 HIGHWAY08 ... - AliExpress
: Low-power microcontroller versions are used in LCD calculators, clocks, and thermometers. Datasheet Resources The IC enters a "hiccup" mode (on/off cycling)
Used in Power Supply Units (PSUs) for Engine Control Units (ECUs) and instrument clusters. AliExpress Reference Resources
Locating the correct pinout is the first step after downloading a "Highway 09 IC datasheet." The pin assignment varies slightly by package. Below is the standard pinout for the and DPAK packages (most common).
: Because the chip is a commodity, its price is highly dependent on order volume. Current listings indicate the following typical prices:
According to repair forum threads, this 20-pin variant is also manufactured by Holtek, potentially for a completely different appliance or a different generation of induction cooker. As one user on the dzdu.com forum stated: "I also encountered HIGHWAY09 (without the A) in a Half-time induction cooker, but it's a 20-pin version". Documentation for the 20-pin version is even scarcer, with only a few forum posts providing limited working voltage data.
The transmitter utilizes a constant-current H-bridge architecture. When the TX pin receives a logic high, internal switches route current through the primary bus pins such that swings positive relative to
For troubleshooting, having known-good static voltage measurements is invaluable. The following readings (sourced from electronics forums) represent the normal, idle (standby) voltages for a HIGHWAY09A when installed in an induction cooker powered by a 220V AC mains supply.