CRMICRO Primary Agent AC to DC linear constant current drive IC PT4515CE89C

CR Powtech Low‑Cost Single‑Stage Linear LED Driver PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC with Zero EMI. No Inductor or Transformer for Simplified System Design

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Overview

PT4515C is a high‑precision linear LED driver IC adopting single‑stage architecture with no EMI issues. No magnetic components such as inductors or transformers are required on peripheral circuits, delivering simplified system design and low BOM cost. Featuring patented current control and compensation technology, it achieves ±3% output current accuracy. Output current is configured via an external resistor with peak current up to 60 mA. Multiple devices can be paralleled to boost total output current. The IC integrates overtemperature and high‑voltage automatic current‑derating functions to enhance lighting system reliability.

PT4515C is offered in TO252‑2L, SOT89‑3L, ESOP‑8 and CPC4 package options.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Features

● Simplified peripheral circuit, no magnetic components (inductor / transformer) required

● Built‑in high‑voltage startup circuit

● Programmable LED output current, maximum peak current 60 mA

● Multi‑chip parallel capability for output‑current expansion

● ±3% high‑precision constant‑current LED output

● Excellent EMI performance with zero EMI interference risk

● Overtemperature automatic current‑derating function

● High‑voltage automatic current‑derating function

● Integrated overtemperature protection

● Package Options: TO252‑2L, SOT89‑3L, ESOP‑8, CPC4

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Applications

● LED Candle Lamps

● LED Bulb Lamps / LED Spotlights

● Other Compact LED Lighting Products

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Ordering Information

Package	Temperature Range	Orderable Part Number	Packaging Specification	Device Marking
TO252‑2L	-40˚C ~ 85˚C	PT4515CETOW	2500pcs / reel Tape & Reel
SOT89‑3L	-40˚C ~ 85˚C	PT4515CE89C	1000pcs / reel Tape & Reel
ESOP‑8	-40˚C ~ 85˚C	PT4515CEESH	4000pcs / reel Tape & Reel
CPC4	-40˚C ~ 85˚C	PT4515CECPC	15000pcs / reel Tape & Reel

Figure 1. PT4515C Typical Application Circuit

Note 1: Absolute Maximum Ratings indicate limits beyond which device damage may occur. Recommended Operating Conditions indicate conditions where functional operation is guaranteed, but not all performance specifications. Electrical Characteristics define DC‑ and AC‑parameter specifications under specified test conditions within recommended operating range. Parameters without stated min/max limits are not guaranteed; typical values represent realistic device performance.

Note 2: PCB Condition: 2‑layer board, 2 Oz copper thickness, 2 inch² copper pour area with 8 thermal vias.

Note 3: Human‑Body‑Model (HBM): 100 pF capacitor discharged through a 1.5 kΩ resistor.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Functional Description

PT4515C is a high‑precision linear LED driver IC built on single‑stage linear architecture with no EMI interference. Magnetic components such as inductors or transformers are eliminated from peripheral circuits for simplified system architecture and reduced BOM cost.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Startup Voltage (OUT Pin)

PT4515C is powered from the OUT pin. When voltage on the OUT pin exceeds the device turn‑on threshold voltage, PT4515C starts up and enters constant‑current regulation.

Constant‑Current Driving (OUT , R_EXT)

The IC sets precise LED output current by means of an external R_EXT resistor.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Overtemperature Regulation

PT4515C implements overtemperature regulation. When junction temperature rises above typical 135 °C, output current is gradually reduced to limit power dissipation and stabilize chip temperature, improving overall system reliability. Under thermal‑derating conditions output current can drop down to approx. 1/8 of the programmed value. Continuous temperature monitoring restores normal output current once temperature falls below typical 135 °C.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC High‑Voltage Current‑Derating Function

PT4515C integrates high‑voltage current‑derating capability. When voltage at OUT pin (TO252, SOT89‑3 & CPC4 packages) or OVP pin (ESOP‑8 package) exceeds typical 80 V, the IC gradually lowers output current to keep output power roughly constant and enhance system stability. Under high‑voltage derating, output current may decrease down to 1/3 of the set value. Normal current resumes automatically after OUT / OVP pin voltage drops below typical 80 V.

PT4515CE89C,PT4515CETOW,PT4515CEESH,PT4515CECPC Application Examples

Figure 4. PT4515C Multi‑Chip Parallel Application Schematic

Figure 5. PT4515C Series‑Connection Application Schematic

Figure 6. PT4515C Valley‑Fill Circuit Application Schematic 1

Figure 7. PT4515C Valley‑Fill Circuit Application Schematic 2

Frequently Asked Questions FAQ

Q1: Does PT4515C require an inductor or transformer?
A1: No. PT4515C is a single‑stage linear LED driver. It works without magnetic components such as inductors and transformers, delivering simplified BOM and zero‑EMI performance.

Q2: What is the maximum output current of PT4515C? Can output current be expanded?
A2: The peak current for a single device is 60 mA. Multi‑chip parallel connection is supported to expand output current for high‑power LED lighting projects.

Q3: What is the overtemperature protection mechanism of PT4515C?
A3: The IC features thermal regulation. When junction temperature exceeds typical 135 °C, output current decreases gradually down to 1/8 of the preset value. Output will auto‑recover once temperature drops; there is no hard latch‑off shutdown.

Q4: What packages are available for PT4515C? Are parts in stock?
A4: Four package options: TO252‑2L, SOT89‑3L, ESOP‑8, CPC4. As an authorized tier‑1 distributor for CRMICRO, GS‑Micro maintains spot stock for full part numbers. Evaluation samples are available upon request.

Q5: What lighting projects are suitable for PT4515C?
A5: It is well‑suited for LED bulb lamps, candle lamps, small spotlights and other compact LED lighting solutions.

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