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AL1663S-13 Equivalent & Substitute Parts
Part Overview
The AL1663S-13 is an LED driver IC manufactured by Diodes Incorporated, designed for offline AC/DC power conversion applications. This device integrates a single-output switcher supporting Flyback, Step-Down (Buck), and Step-Up (Boost) topologies with analog and PWM dimming capabilities. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The AL1663S-13 operates across a 7V to 30V supply range and is optimized for backlight and lighting applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AL1663S-13 |
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Type | AC DC Offline Switcher |
| Topology | Flyback, Step-Down (Buck), Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 7V |
| Voltage - Supply (Max) | 30V |
| Voltage - Output | 20V |
| Frequency | 150kHz |
| Dimming | Analog, PWM |
| Operating Temperature | -40°C ~ 105°C (TA) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the AL1663S-13 is determined by the following critical parameters:
- Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
- Supply voltage range overlap: Minimum 7V to 30V maximum
- Topology support: AC DC Offline Switcher with Flyback capability
- Single output configuration
- Operating temperature range: -40°C to 105°C minimum
- Dimming capability: Analog and/or PWM support
- RoHS3 compliance and REACH unaffected status
The identified substitutes meet these core electrical and mechanical requirements while maintaining functional equivalence for LED driver applications.
Parameter Comparison
| Parameter | AL1663S-13 | AL1665S-13 | XDPL8105XUMA1 |
|---|---|---|---|
| Manufacturer | Diodes Incorporated | Diodes Incorporated | Infineon Technologies |
| Type | AC DC Offline Switcher | AC DC Offline Switcher | AC DC Offline Switcher |
| Topology | Flyback, Step-Down (Buck), Step-Up (Boost) | Flyback, Step-Down (Buck), Step-Up (Boost) | Flyback |
| Number of Outputs | 1 | 1 | 1 |
| Voltage - Supply (Min) | 7V | 8.5V | 6V |
| Voltage - Supply (Max) | 30V | 21.8V | 24V |
| Frequency | 150kHz | 150kHz | 180kHz |
| Dimming | Analog, PWM | Analog, PWM | Not specified |
| Operating Temperature | -40°C ~ 105°C (TA) | -40°C ~ 105°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
AL1665S-13 (Diodes Incorporated) is the primary substitute for the AL1663S-13. Both devices are manufactured by Diodes Incorporated and share identical topology support (Flyback, Step-Down, Step-Up), frequency (150kHz), dimming capabilities (Analog, PWM), and operating temperature range (-40°C to 105°C). The AL1665S-13 maintains active product status and ROHS3 compliance. The supply voltage range differs slightly (8.5V to 21.8V versus 7V to 30V), which may require circuit design verification for applications operating below 8.5V or above 21.8V.
XDPL8105XUMA1 (Infineon Technologies) serves as an alternative substitute. This device supports the Flyback topology and operates across a 6V to 24V supply range, providing broader low-voltage coverage. However, the operating temperature maximum is limited to 85°C (versus 105°C for the AL1663S-13), and dimming capability is not specified. The switching frequency is 180kHz, and moisture sensitivity is rated at MSL 3 (168 Hours), requiring controlled storage conditions. XDPL8105XUMA1 is suitable for applications where the reduced temperature range and unspecified dimming do not present constraints.
Frequently Asked Questions (FAQ)
Q: Can AL1665S-13 replace AL1663S-13 in all applications?
A: AL1665S-13 is compatible for most applications. Verify that your circuit operates within the AL1665S-13 supply voltage range (8.5V to 21.8V). If your design requires operation below 8.5V or above 21.8V, circuit redesign may be necessary.
Q: What are the key differences between AL1665S-13 and XDPL8105XUMA1?
A: AL1665S-13 supports multiple topologies (Flyback, Buck, Boost) with confirmed dimming capability and a 105°C maximum operating temperature. XDPL8105XUMA1 supports Flyback topology only, has unspecified dimming capability, and operates to 85°C maximum. Choose AL1665S-13 for applications requiring higher temperature operation or multiple topology support.
Q: Are all substitutes pin-compatible?
A: All three devices use the 8-SOIC (0.154", 3.90mm Width) package. Verify pinout compatibility with the device datasheets before PCB layout or rework.
Q: What is the impact of MSL rating differences?
A: AL1663S-13 and AL1665S-13 have MSL 1 (Unlimited shelf life). XDPL8105XUMA1 has MSL 3 (168 Hours), requiring controlled storage at specified temperature and humidity. Plan procurement and inventory management accordingly.
Q: Are all substitutes RoHS3 compliant?
A: Yes. AL1663S-13, AL1665S-13, and XDPL8105XUMA1 are all ROHS3 compliant and REACH unaffected.
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