This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

SN6505BDBVR +BOM

Low-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

Manufacturer:

TI
Mfr.Part #:

SN6505BDBVR
Datasheet:

SN6505BDBVR Datasheet (PDF)
Pbfree Code:

Yes
Part Life Cycle Code:

Active
Reach Compliance Code:

compliant
ECCN Code:

EAR99
EDA/CAD Models:

Request Free CAD Models for SN6505BDBVR

SN6505BDBVR General Description

The SN6505x is a low-noise, low-EMI push-pull transformer driver, specifically designed for small form factor, isolated power supplies. It drives low-profile, center-tapped transformers from a 2.25 V to 5 V DC power supply. Ultra-low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The SN6505x consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive ground-referenced N-channel power switches. The device includes two 1-A Power-MOSFET switches to ensure start-up under heavy loads. The switching clock can also be provided externally for accurate placement of switcher harmonics, or when operating with multiple transformer drivers. The internal protection features include a 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. SN6505x include s a soft-start feature that prevents high inrush current during power up with large load capacitors. SN6505A has a 160 kHz internal oscillator for applications that need to minimize emissions whereas SN6505B has a 420 kHz internal oscillators for applications that require higher efficiency and smaller transformer size. The SN6505x is available in a small 6-pin SOT23/DBV package. The device operation is characterized for a temperature range from –55°C to 125°C.

Key Features

Push-pull driver for transformers
Wide input voltage range: 2.25 V to 5.5 V
High output drive: 1 A at 5 V supply
Low R ON 0.25 Ω max at 4.5 V supply
Ultra-low EMI
Spread spectrum clocking
Precision internal oscillator options: 160 kHz ( SN6505A) and 420 kHz ( SN6505B)
Synchronization of multiple devices with external clock input
Slew-rate control
1.7 A Current-limit
Low shutdown current: <1 µA
Thermal shutdown
Wide temperature range: –55°C to 125°C
Small 6-Pin SOT23 (DBV) package
Soft-start to reduce In-rush current

Specifications

Source Content uid	SN6505BDBVR	Pbfree Code	Yes
Part Life Cycle Code	Active	Reach Compliance Code	compliant
ECCN Code	EAR99	HTS Code	8542.39.00.01
Interface IC Type	INTERFACE CIRCUIT	JESD-30 Code	R-PDSO-G6
JESD-609 Code	e4	Length	2.9 mm
Moisture Sensitivity Level	1	Number of Functions	1
Number of Terminals	6	Operating Temperature-Max	125 °C
Operating Temperature-Min	-55 °C	Output Current-Max	1.5 A
Peak Reflow Temperature (Cel)	260	Seated Height-Max	1.45 mm
Supply Voltage-Max	5.5 V	Supply Voltage-Min	2.25 V
Supply Voltage-Nom	5 V	Surface Mount	YES
Temperature Grade	MILITARY	Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form	GULL WING	Terminal Pitch	0.95 mm
Terminal Position	DUAL	Time@Peak Reflow Temperature-Max (s)	30
Width	1.6 mm	Rating	Catalog
Iout (typ) (A)	1	Vin (min) (V)	2.25
Vin (max) (V)	5.5	Features	Enable, Short-circuit protection, Slew-rate control, Spread spectrum clocking, Thermal shutdown
Soft start	Yes	Operating temperature range (°C)	-55 to 125
Iout (max) (A)	1.5	Switching frequency (min) (kHz)	363
Switching frequency (max) (kHz)	517	Switch current limit (typ) (A)	2