Kinetic Technologies Developed KTS1678 and KTS1679-1, Two Surge Protected, Single Input, Dual Output Load Switches with OVP

San Jose, Calif. September 5, 2016 – Kinetic Technologies, a high-performance analog and mixed-signal semiconductor company focused on developing power management solutions for computing, consumer, industrial, and communications markets, today introduced the KTS1678 and KTS1679-1, both single input, dual output, surge protected, Load Switches with selectable OVP. The KTS1678 and KTS1679-1 are specifically designed for routing VBUS power to provide alternative functions in mid-to-high end smartphones or tablets.

Both the KTS1678 and KTS1679-1 consist of two very low resistance power switches configured as single input, dual output, change-over switch. The input to both switches is protected against VBUS surge voltages of up to 100V, and is also protected against over-voltage, on both the VBUS to OUT and VBUS to SYS paths, providing protection to downstream components from abnormal input conditions. The main switch (VBUS to OUT) features a unidirectional, 23m, active-LOW enabled 3.5A rated MOSFET, while the secondary switch (VBUS to SYS) is a reverse-blocking, 30m, active-HIGH enabled, 6.0A rated MOSFET. Both input switches are rated up to a maximum of 28V. The KTS1678 has a fixed OVP trip point of 13.9V 400mV for the VBUS to OUT switch, with an OVP trip point of 5.25V 250mV for VBUS to SYS switch. The KTS1679-1, replaces the SHDN pin (used to conserve power) with a SEL pin, giving the user the option to either select the VBUS to OUT OVP trip point to 10.4V 300mV by allowing the SEL pin to float or to 5.8V 200mV by tying the SEL pin to GND. This allows compatibility with many of the fast charging schemes, that use higher charging voltages. The VBUS to BAT OVP remains fixed at 5.8V 400mV.

When VBUS is greater than 2.7V, the KTS1678 POK LDO provides an always ON power source, regardless of the OVLO, EN1 and EN2 state, to power downstream components permitting operation without an installed battery. In the KTS1679, the POK LDO is replaced by a battery voltage sense function (SNS), that switches off the charging current to the battery, if the battery voltage exceeds its maximum rating.

The introduction of the Type-C USB connector has provided smartphone manufacturers with both an opportunity and a challenge said Phil Dewsbury, Senior Director of Product Marketing at Kinetic Technologies, while the Type-C connector offers the ability to handle a higher charging current, those manufacturers previously using an un-committed pin on the Micro-USB connector for test purposes, have to look for an alternative solution. The KTS1678 offers those manufacturers the opportunity to use the VBUS pin to directly route the tester to the system board, bypassing the integrated battery charger. Alternatively, the KTS1679-1 allows manufacturers using high current, direct charging adapters to directly access the battery terminals, safe in the knowledge that any over-charge will be detected by the integrated OVP circuitry.

The KTS1678 and KTS1679-1 are supplied in a WLCSP-28, 2.96 x 1.67mm, RoHS and Green Compliant packages and are rated over the -40 degree C to +85 degree C temperature range.

Key Features of KTS1678/KTS1679-1

Single Input, Dual Output Low On- Resistance Switch

- VBUS to OUT: typ. 23m

- VBUS to SYS: typ. 30m (Reverse Blocking)

Wide Input Voltage Range: 2.7V 13.5V

VBUS Abs Max: 28V

Surge and ESD Protected Input

- Surge Protection

IEC61000-4-5: > 100V

ESD Protection

IEC61000-4-2 (Level 4) VBUS

Contact: 8kV

Air Gap: 15kV

HBM: 2kV All Pins

Integrated Over-voltage Protection (OVP)

- KTS1678

VBUS to OUT: 13.9V 400mV

VBUS to SYS: 5.25V 250mV

- KTS1679-1

VBUS to OUT: 10.4V 300mV or 5.8V 200mV

VBUS to SYS: 5.8V 200mV

Maximum Continuous Current

- VBUS to OUT: 3.5A

- VBUS to SYS: 6A

Dual Enable Control with Independent Shutdown Control

- Active LOW VBUS to OUT

- Active HIGH VBUS to SYS

VBUS to SYS/BAT FLAG

Over Temperature Protection

KTS1678 Only

- Active HIGH Shutdown

- VBUS detection LDO

KTS1679-1 Only

- OVP Select

- Battery OVP