Z1236QI-01 Step Down IC Pinout & Working
Z1236QI-01 Step Down IC Pinout and Working This is a step down regulator IC, it is commonly used in Sony LED TV boards. Specifically, this IC takes 19 volts input and provides five volts output. We will discuss the pin connections of this IC, its working principle, its feedback so that it is a helpful tool for the technician to understand how this IC works.
Pin description
Pin: 1 Power Good Signal Output. PGOOD is an open-drain output used to indicate the status
of the output voltage. It is internally pulled low when the output voltage is 10% lower than
the nominal regulation voltage for 50µs (typical time) or 15% higher than the nominal
regulation voltage. PGOOD is pulled low during soft-start and shut down.
Pin:2 Enable Input. The AOZ1232-01 is enabled when EN is pulled high. The device shuts
down when EN is pulled low.
Pin:3 PFM Selection Input. Connect PFM pin to VCC/VIN for forced PWM operation. Connect
PFM pin to ground for PFM operation to improve light load efficiency.
Pin: 4, 29 AGND Analog Ground.
Pin: 5 FB Feedback Input. Adjust the output voltage with a resistive voltage-divider between the
regulator’s output and AGND.
Pin:6 TON On-Time Setting Input. Connect a resistor between VIN and TON to set the on time.
Pin:7 AIN Supply Input for analog functions.
Pin: 8, 9, 10, 11 IN Supply Input. IN is the regulator input. All IN pins must be connected together.
Pin: 12, 13, 14, 15, 16,
17, 18, 19, 26 PGND Power Ground.
Pin: 20, 21, 22, 23,
24, 25 LX Switching Node.
Pin: 27 BST
Bootstrap Capacitor Connection. The AOZ1232-01 includes an internal bootstrap diode.
Connect an external capacitor between BST and LX as shown in the Typical Application
diagrams.
Pin: 28 VCC Output for internal linear regulator. Bypass VCC to AGND with a 1µF ceramic capacitor.
Place the capacitor close to VCC pin.
Pin: 30 SS Soft-Start Time Setting Pin. Connect a capacitor between SS and AGND to set the
soft-start time.
TCL 32S6500 3V3_STB TO 1V5_DDR
Shaukat Ali
Shaukat Ali is a professional Sony LED TV repair technician with over 30 years of experience. He specializes in diagnosing and fixing complex display and board-level faults. Based in Lahore, he shares real-world repair cases to help both customers and fellow technicians.
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Shaukat Ali – Expert LED TV Repair Technician in Lahore
With over 30 years of hands-on experience in LED TV repair, I specialize in identifying and fixing complex display and motherboard faults.
Based in Lahore, I offer expert repair insights for leading brands including Sony, Samsung, TCL, Orient, Haier, and ETC.
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