R1200 Series

PWM Step-up DC/DC Converter for PMOLED and General Use with Shutdown Function

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Description

The R1200 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive PMOLED or white LEDs with constant current. The R1200 includes an under-voltage lockout circuit (UVLO), a soft-start circuit, and an over-voltage protection circuit (OVP). By simply using an inductor, divider resistors, and capacitors as external components, PMOLEDs and white LEDs can be driven with high efficiency.

At the standby mode, the internal NPN transistor can separate the output from the input. (Shutdown function) By this shutdown function, the LED current can be completely shutdown, and output voltage for PMOLED can be completely cut off, therefore, the R1200 does not have bad impact on the life expectancy of PMOLED. The version with auto-discharge function is available.

Spec

	Consumer
Input Voltage Range	2.3 V to 5.5 V (6.5 V)
Operating Temperature Range	-40°C to 85°C (125°C)
Supply Current	Typ. 500 µA
Standby Current	Typ. 0 µA
Output Voltage Range	Max. 20 V (0.1 V step)
Feedback Voltage	1.0 V (Externally adjustable)
Feedback Voltage Accuracy	±1.5%
Feedback Voltage Temperature Coefficient	±150 ppm/°C
Driver ON-resistance	Typ. 1.35 Ω
Oscillator Frequency	Typ. 1200 kHz
Maximum Duty Cycle	Typ. 91%
Package	DFN1616-6, SOT-23-6

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TSD	ILX	OCP	OVP	UVLO	OVLO	Reverse	Shutdown	Soft Start	SSCG	PGOOD	Auto Discharge	Anti-ringing	Sequencing	Max Duty	Ext. Phase	LED Adjust

Functional Description

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
R1200Lxxxx-TR		DFN1616-6	R1200L	R1200L
R1200Nxxxx-TR-FE		SOT-23-6	R1200N	R1200N-FE

Refer to the datasheets for the details on the product.
The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

TSD	Thermal Shutdown Function
ILX	LX Current Limit Function
OCP	Overcurrent Protection
OVP	Overvoltage Protection
UVLO	Undervoltage Lockout Protection
OVLO	Overvoltage Lockout Protection
Reverse	Reverse Current Protection Circuit
Shutdown	Shutdown Function
Soft Start	Soft Start Function
SSCG	Spread Spectrum Clock Generator Function
PGOOD	Power Good Output
Auto Discharge	Auto Discharge Function
Anti-ringing	Anti-ringing Switch Function
Sequencing	Start-up Sequencing Control
Max Duty	Maximum Duty Cycle
Ext. Phase	Externally Adjustable Phase Compensation
LED Adjust	LED High-speed Dimming Control