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Diodes Incorporated AP3602BKTR-E1
- Part No.:
- AP3602BKTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
AP3602BKTR-E1.pdf
- Description:
- IC LED DRVR RGLTR 100MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
AP3602BKTR-E1 from BCD Semiconductor Manufacturing Limited is a regulated charge pump DC/DC converter optimized for 4.5V output in battery-powered LED applications. It delivers 100mA continuous output current from 2.7–4.5V input, features 1.2MHz switching frequency, ±4% output voltage regulation, and integrated over-temperature protection - enabling use as a flash LED driver in compact handheld devices.
For engineers reviewing the AP3602BKTR-E1 datasheet, AP3602BKTR-E1 pinout, AP3602BKTR-E1 application, or AP3602BKTR-E1 equivalent, key selection criteria include input voltage range compatibility (2.7–4.5V), 4.5V fixed output precision, shutdown current <1μA, thermal protection behavior, and SOT-23-6 layout constraints for space-constrained portable designs.
Technical Context
The AP3602BKTR-E1 implements a two-phase switched-capacitor charge pump with internal 1.25V reference and comparator-based feedback control. Regulation is achieved via an internal resistor divider sensing VOUT, triggering pulse-skipping idle mode when output reaches target.
It operates at fixed 1.2MHz oscillator frequency with 50% duty cycle, uses external flying capacitor (CFLY) and input/output ceramic capacitors (CIN/COUT), and integrates thermal shutdown with ~160°C trip point and 10°C hysteresis to prevent latch-up during sustained short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.5V ±4% - tightly regulated for consistent white LED forward bias across varying input and load. |
| Max Continuous Output Current | 100mA @ VIN ≥3.0V - sufficient to drive 4×3.2V LEDs in series with 91Ω current-limiting resistors. |
| Input Voltage Range | 2.7V to 4.5V - matches Li-ion/Li-poly battery discharge profile without requiring low-VIN dropout support. |
| Quiescent Current | 13μA typical - minimizes standby power loss in always-on mobile device subsystems. |
| Shutdown Supply Current | <1μA - enables ultra-low-power system-level sleep modes with negligible battery drain. |
| Switching Frequency | 1.2MHz - allows use of small 1μF ceramic flying capacitor and reduces EMI filtering burden. |
| Thermal Shutdown Threshold | ~160°C with 10°C hysteresis - provides self-recovering fault protection during transient overloads or PCB thermal congestion. |
Pinout & Package
SOT-23-6 package with 1.27mm pitch, 2.9mm × 2.8mm footprint, and 1.45mm max height - compatible with standard high-density PCB assembly processes and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VOUT | Regulated output node | Supplies stable 4.5V to LED strings; requires local 1–22μF low-ESR ceramic bypass capacitor placed adjacent to pin. |
| 2 GND | Power and signal reference | Must connect to solid ground plane; CIN and COUT capacitors should be routed nearest this pin for minimal loop inductance. |
| 3 SHDN | Active-low enable control | Logic-compatible input (VIH ≥1.4V, VIL ≤0.3V); must not float - tie to MCU GPIO or pull-up for default-on operation. |
| 4 C− | Flying capacitor negative terminal | Connects to low-side of 1μF ceramic CFLY; placement proximity critical to minimize switching noise coupling. |
| 5 VIN | Input supply rail | Accepts 2.7–4.5V battery input; requires local 1–22μF ceramic bypass capacitor near pin to stabilize charge pump sourcing. |
| 6 C+ | Flying capacitor positive terminal | Connects to high-side of 1μF ceramic CFLY; forms charge transfer path with C− during phase-switching cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Low quiescent current | 13μA typical - extends battery life in standby states without compromising startup responsiveness. |
| Fixed 4.5V output | ±4% tolerance over temperature and load - eliminates need for external feedback resistors and simplifies BOM. |
| Pulse-skipping regulation | Enables >90% efficiency at light loads by dynamically disabling switching cycles - reduces RMS ripple and EMI. |
| Integrated thermal protection | Auto-recovering shutdown at ~160°C - prevents permanent damage during LED short-circuit or PCB thermal overload. |
| Minimal external components | Only three ceramic capacitors required (CIN, COUT, CFLY) - reduces board area and total solution cost vs. inductor-based boosters. |
Applications
| Mobile Phone Flash Driver | Portable Media Player Backlight |
|---|---|
Use Scenario: High-intensity camera flash in smartphones with single-cell Li-ion battery (2.7–4.2V). IC Role / Device Role / Timing Role: Regulated 4.5V charge pump supplying pulsed 250mA peak current for 100ms to 4-series white LEDs. Use Value: Enables consistent flash brightness across battery discharge curve without requiring complex battery-gauge-aware dimming logic. |
Use Scenario: Backlight for QVGA LCD in MP3/MP4 players powered by 3.0V nominal coin cell or Li-poly pack. IC Role / Device Role / Timing Role: Constant-voltage source delivering 100mA continuous current to parallel LED strings with current-limiting resistors. Use Value: Maintains uniform display luminance down to 2.7V battery cutoff while consuming only 13μA in display-off state. |
| Handheld Barcode Scanner | Wireless Headset Status Indicator |
Use Scenario: Illumination LED for optical scanning in ruggedized industrial handheld scanners. IC Role / Device Role / Timing Role: Provides regulated 4.5V rail to drive high-brightness LED with fast turn-on time (<0.2ms) synchronized to scan trigger. Use Value: Ensures reliable decode performance under cold ambient conditions (-40°C) where battery voltage sags and LED VF rises. |
Use Scenario: Dual-color status LED (red/green) in Bluetooth headsets with tight space and thermal constraints. IC Role / Device Role / Timing Role: Supplies stable 4.5V to both LED anodes while enabling independent cathode switching via MCU GPIOs. Use Value: Eliminates need for separate LDOs or resistor networks, reducing component count and thermal dissipation in sealed enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3602AKTR-E1 | 5.0V fixed output, wider input range (2.7–5.0V), higher efficiency (92% vs. 83% at 2.7V/50mA) | Designed for 5V LED strings or systems with higher battery upper limit (e.g., USB-charged packs) | Select when output voltage requirement is 5.0V and input may exceed 4.5V; not drop-in for 4.5V-targeted designs. |
| MAX682ESA+ | 4.5V output, but requires external feedback resistors; no integrated thermal shutdown; 50mA max continuous current | Lacks auto-recovering thermal protection and peak-current capability - unsuitable for flash applications | Consider only for low-power static backlighting where thermal margin is guaranteed and peak pulses are absent. |
Compared with AP3602AKTR-E1, the AP3602BKTR-E1 trades higher efficiency and 5V compatibility for tighter 4.5V regulation suited to lower-VF LED stacks; versus MAX682ESA+, it adds integrated protection, higher output current, and fixed-output simplicity at the cost of slightly larger quiescent current.
Availability
AP3602BKTR-E1 is available at Aetrix Electronics and suitable for mobile phone flash drivers, portable media player backlights, handheld barcode scanners, and wireless headset status indicators requiring stable component supply with RoHS-compliant packaging.
Supply support for AP3602BKTR-E1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
BCD Semiconductor Manufacturing Limited is a Shanghai-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer and industrial markets.
The AP3602 series belongs to BCD's regulated charge pump product line, engineered specifically for space- and efficiency-constrained battery-powered LED applications where inductor-free DC/DC conversion is mandatory.
FAQ
What is the maximum allowable input voltage for AP3602BKTR-E1?
The absolute maximum input voltage is 7V, but the recommended operating range is strictly 2.7V to 4.5V per datasheet specifications. Exceeding 4.5V risks violating the AP3602B's design envelope and may cause premature thermal shutdown or reduced long-term reliability - use AP3602AKTR-E1 for 5V-tolerant applications.
Can AP3602BKTR-E1 drive more than four white LEDs in series?
No - its 4.5V regulated output limits practical use to LED strings with total forward voltage ≤4.2V (e.g., four 3.2V LEDs with 91Ω resistors). Attempting to drive five 3.2V LEDs (16V VF) would result in regulation failure and uncontrolled current collapse; a higher-output or inductor-based booster is required.
How does the SHDN pin behave during power-up?
The SHDN pin defaults to disabled (high-impedance) until externally pulled high or low; floating causes undefined operation. For reliable startup, tie SHDN to VIN via 100kΩ resistor or drive directly from a GPIO configured as push-pull - internal pull-up/pull-down is not present.
Is the 250mA peak current rating sustainable beyond 100ms?
No - the 250mA peak is specified for ≤100ms bursts only, after which thermal accumulation triggers pulse-skipping or thermal shutdown. Sustained operation above 100mA will exceed junction temperature limits; continuous current must remain ≤100mA with proper PCB copper area and ambient cooling.
AP3602BKTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 4.5V
- Voltage - Output:
- 4.8V ~ 5.2V
- Current - Output / Channel:
- 100mA
- Frequency:
- 1.2MHz
- Dimming:
- -
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AP3602BKTR-E1 FAQ
1.How can I place an order for AP3602BKTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3602BKTR-E1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP3602BKTR-E1 reliable?
The price and inventory of AP3602BKTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3602BKTR-E1 is usually 5 days.
3.What payment methods are accepted for AP3602BKTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3602BKTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3602BKTR-E1?
AP3602BKTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3602BKTR-E1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP3602BKTR-E1?
For technical support, including AP3602BKTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3602BKTR-E1 requirements.
6.How does Aetrix verify that AP3602BKTR-E1 is sourced from the original manufacturer or authorized distributors?
All AP3602BKTR-E1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP3602BKTR-E1 meets industry standards.
7.What is the process for return or replacement of AP3602BKTR-E1?
All AP3602BKTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3602BKTR-E1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP3602BKTR-E1 part is unused and in its original packaging.
Return procedure for AP3602BKTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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