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▶ Parts / Component Details
➔ Total Number Of ICs: 2
➔ Total Number Of Resistor: 8
➔ Total Number Of Capacitor:6
➔ Total Number Of Coil / Inductors: 2
➔ Total Number Of Diode: 1
➔ Total Number Of LEDs: 20
★ IC Details :
IC NO 1. Bridge Rectifier IC
➔ Total Number Of ICs: 2
➔ Total Number Of Resistor: 8
➔ Total Number Of Capacitor:6
➔ Total Number Of Coil / Inductors: 2
➔ Total Number Of Diode: 1
➔ Total Number Of LEDs: 20
★ IC Details :
IC NO 1. Bridge Rectifier IC
IC Purpose: Converts AC voltage to DC voltage.
IC Number: MB10SIC Total Number Of Pins: 4 Pins
★ MB10S Pin Configuration:
Pin 1 & Pin 4: AC Voltage Input.
Pin 2 & Pin 3: DC Voltage Output.
Working Operation: The MB10S bridge rectifier has four diodes arranged in a bridge configuration to convert the alternating current (AC) from the mains into direct current (DC), which is needed for powering the LED lamp.
Purpose Of This IC: Manages power conversion and regulation.
IC Number: Si9762B
IC Total Number Of Pins: 8 Pins
IC Number: Si9762B
IC Total Number Of Pins: 8 Pins
★ Si9762B IC Pin Configuration:
Pin No 1: COMP - Compensation pin for the feedback loop.
Pin No 2: GND - Ground.
Pin No 3: VCC - Supply voltage.
Pin No 4: FB - Feedback pin for voltage regulation.
Pin No 5: DRN - Drain pins for the MOSFETs.
Pin No 6: DRN - Drain pins for the MOSFETs.
Pin No 7: ISEN - Current sense pins for current monitoring.
Pin No 8: ISEN - Current sense pins for current monitoring.
➔ Si9762B IC Working Operation: The Si9762B is a power management IC used to control the power delivery to the LED array, ensuring stable and efficient operation.
★ Resistors Details:
➔ Resistor No 1: (R1)
Resistor Value / Resistance: 68Ω
➔ Resistor No 2: (R2)
Resistor Value / Resistance: 4.7kΩ
➔ Resistor No 3: (R3)
Resistor Value / Resistance: 3.9kΩ
➔ Resistor No 4: (R4)
Resistor Value / Resistance: 6.2kΩ
➔ Resistor No 5: (R5)
Resistor Value / Resistance: 3.92Ω
➔ Resistor No 6: (R6)
Resistor Value / Resistance: 110kΩ
➔ Resistor No 7: (R7)
Resistor Value / Resistance: 110kΩ
➔ Resistor No 8: (R8)
Resistor Value / Resistance: 100kΩ
★ Capacitors Details:
➔ Capacitor No 1: (C1)
Capacitor Value / Capacitance: 4.7µF
Type: Electrolytic or ceramic, used for smoothing and filtering applications.
➔ Capacitor No 2: (C2)
Type: Metallized Polyester Film Capacitor.
Value: CY400 473JC (47,000pF or 47nF)
Function: Used for high-frequency filtering and stability in the circuit.
➔ Capacitor No 3: (C3)
Capacitor Value / Capacitance: 4nF
➔ Capacitor No 4: (C4)
Capacitor Value / Capacitance: 4.7µF
➔ Capacitor No 5: (C5)
Capacitor Value / Capacitance: 68µF
★ Coil / Inductors Details:
➔ Coil / Inductors No 1: (L1)
Coil Value /inductance: 3nH
➔ Coil / Inductors No 2: (L2)
Coil Value /inductance: 4.7nH
★ Diode Details:
Diode Number: ES1J
Diode Value / Specification: 600Volt 1Ampere
Working Function: Acts as a rectifier to convert AC to DC or protect against voltage spikes.
★ LED Details:
LED Type: SMD
LED Number: SMD2835, SMD3528, SMD5050,
LED Types: SMD (Surface Mount Device)
★LEDs Characteristics: These are high-efficiency LEDs with different sizes and brightness levels.
SMD2835: 0.2W 3V, Compact and efficient, often used in strip lighting.
SMD3528: 0.2W 3V, Smaller size, generally used for lower-brightness applications.
SMD5050: 0.2W 3V, Larger and brighter, used in applications needing more light output.
#LED Light Bulb Circuit Operation Step-By-Step ➔
★ Step 1: AC to DC Conversion
The MB10S bridge rectifier (IC No. 1) converts the AC voltage from the main supply into a pulsating DC voltage. The AC input is connected to the bridge rectifier’s AC input pins, and the resulting DC voltage is available at the DC output pins.
★ Step 2: Power Management
The Si9762B power management IC (IC No. 2) regulates the DC voltage to the appropriate level required for the LED operation. It controls power delivery through feedback and current sensing, ensuring the LEDs receive a stable and efficient power supply.
★ Step 3: Filtering and Smoothing
Capacitors (C1, C2, C3, C4, C5) filter and smooth the rectified DC voltage. This helps reduce noise and voltage ripple, providing a stable supply to the LEDs.
★ Step 4: Current Limiting and Regulation
Resistors (R1-R8) are used in various parts of the circuit to limit current to the LEDs and set operating points for other components. They play a crucial role in maintaining the correct operating conditions for each part of the circuit.
★ Step 5: Inductive Filtering
Coils/Inductors (L1, L2) filter high-frequency noise and stabilize the power supply to the LEDs.
★ Step 6: Protection
The ES1J diode provides protection against voltage spikes and surges, ensuring the longevity and reliability of the circuit.
★ Step 7: LED Operation
The LEDs (SMD2835, SMD3528, SMD5050) are connected to the regulated DC power supply. They light up with high efficiency, converting electrical energy into visible light.
#Some Questions And Answers Related To LED Light Bulb & Lamp Circuit Diagram And Datasheet
❖ Question: Which type of SMD LED is used in 5W,9W,12W, 15W, 18W, and 24Wattled bulbs?
➔ Answer: 3 type Led, SMD2835, SMD3528, SMD5050 (use Any One).
❖ Question: What is the PWM IC number of the LED bulb?
➔ Answer: Si9762B
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