RT9470WSC Equivalent & Substitute Parts

Part Overview

The RT9470WSC is an active, production-status lithium-ion/polymer battery charger IC manufactured by Richtek USA Inc. This single-cell charger integrates programmable charging current and timer functions with comprehensive fault protection including over-current, over-temperature, and over-under voltage monitoring. The device operates across a -40°C to 85°C temperature range and supports I2C interface communication for system integration. Finding equivalent substitute parts is necessary to address supply chain flexibility, packaging preferences, and inventory availability while maintaining identical electrical and mechanical performance.

Substiute Parts

RT9470WSC

Richtek USA Inc.In Stock: 3248RT9470WSC Datasheet

Current PartRFQ

RT9470DWSC

Richtek USA Inc.In Stock: 20433RT9470DWSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT9470WSC is permissible with the RT9470DWSC based on strict parametric equivalence. Both parts share identical electrical specifications across all critical performance parameters: single-cell lithium-ion/polymer charging capability, 3A maximum charge current, 4.7V battery pack voltage, 13.5V maximum supply voltage, I2C interface, and -40°C to 85°C operating temperature range. Both devices incorporate programmable current and timer functions with identical fault protection mechanisms (over-current, over-temperature, over-under voltage). The mechanical interface is identical, utilizing the 30-WLCSP (2.1x2.5) package footprint. Both parts maintain equivalent compliance certifications: ROHS3 compliance, REACH unaffected status, and MSL 1 rating. The sole difference between these parts is packaging format: RT9470WSC is supplied in Cut Tape (CT) & Digi-Reel® format, while RT9470DWSC is supplied in Tape & Reel (TR) format. This packaging distinction does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both RT9470WSC and RT9470DWSC are active production parts manufactured by Richtek USA Inc. with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on packaging and supply chain requirements rather than electrical or mechanical performance, as all functional parameters are identical.

The RT9470WSC in Cut Tape & Digi-Reel® format is suitable for lower-volume applications, prototype development, and situations requiring flexible unit quantities. The RT9470DWSC in Tape & Reel format is optimized for high-volume manufacturing environments with automated pick-and-place assembly processes. Both parts maintain identical PCB footprints and solder reflow profiles due to the common 30-WLCSP (2.1x2.5) package specification.

Selection should account for manufacturing volume, assembly equipment compatibility, and inventory management practices. No electrical re-qualification is required when transitioning between these parts, as all performance specifications, compliance certifications, and operating characteristics remain constant.

Frequently Asked Questions (FAQ)

Q: Can RT9470DWSC be used as a direct replacement for RT9470WSC in production assembly?

A: Yes. Both parts are electrically and mechanically identical. The RT9470DWSC differs only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel®). No circuit modifications, firmware updates, or design changes are required. The 30-WLCSP (2.1x2.5) footprint is identical for both parts.

Q: Are there any compliance or certification differences between RT9470WSC and RT9470DWSC?

A: No. Both parts carry identical compliance certifications: ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. No additional qualification or testing is required when substituting between these parts.

Q: What is the primary reason to choose RT9470DWSC over RT9470WSC?

A: The RT9470DWSC in Tape & Reel format is preferred for high-volume manufacturing with automated assembly equipment. The RT9470WSC in Cut Tape & Digi-Reel® format is suitable for lower volumes, prototyping, and applications requiring smaller unit quantities.

Q: Do the charging performance specifications differ between these parts?

A: No. Both parts deliver identical charging performance: 3A maximum charge current, 4.7V battery pack voltage, 13.5V maximum supply voltage, programmable current and timer functions, and identical fault protection (over-current, over-temperature, over-under voltage).

Q: Is the I2C interface implementation identical on both parts?

A: Yes. Both RT9470WSC and RT9470DWSC implement identical I2C interface specifications. No firmware or software modifications are required when substituting between these parts.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 85°C (TA). No thermal performance differences exist between RT9470WSC and RT9470DWSC.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts are functionally and mechanically identical. Mixing packaging formats in a single production batch does not affect electrical performance, compliance status, or reliability. Assembly equipment must be configured to handle the appropriate packaging format for each part.