Details, datasheet, quote on part number: S-8335A200FT
PartS-8335A200FT
CategoryPower Management => Regulators => Switching Regulators
DescriptionControl Method = 3-channel For LCD ;; Operation Start Voltage = (Input 2.4-5V) ;; Output Voltage = Maximum 12.41-16.59V) ;; Output Accuracy = - ;; Switching Frequency = 100 KHZ ;; Current Consumption Operating = 100 µA (Mode 1, Vbat=3V) ;; Current Consumption Shutdown = 1 µA (Mode 3, Vbat=3V) ;; Efficiency Typ. = 82% ;; Package = 24-pin Tssop
CompanySeiko Instruments
DatasheetDownload S-8335A200FT datasheet
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Features, Applications

Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply

The S-8335 Series is a bias supply IC for a Multi Line Addressing (MLA) driven LCD using a dual-line simultaneous selection mode. This IC supports medium-sized LCD panels. Two step-up type and one inverter type PFM control CMOS switching regulators supply the required positive or negative power to the two MLA-driven LCD common drivers and segment drivers. Because of its CMOS structure, the current consumption of the S8335 Series is extremely low, which makes it ideal for the LCD power supply of portable equipment that requires low power consumption. Also, an extremely low power consumption LCD module can be created by using 1 the S-8335 Series with the LCD common driver : 1 Manufactured by Hitachi, Ltd.) and segment driver (HD66522 : Manufactured by Hitachi, Ltd.).

Features

Supports four types of LCD panels (1/240 duty, 1/200 duty, 1/160 duty, and 1/120 duty). Input voltage range: 5.0 V (The S-8335 can be driven by a single direct-coupled lithium battery.) Output voltage range Common driver positive power supply (VRH) output voltage range(typ.value) V (S-8335A120FT) (This supply can be varied by on-chip 6-bit electric volume. Power MOSFET is built in.) Common driver negative power supply (VRL) output voltage range(typ.value) V (S-8335A120FT) Segment driver positive power supply (VCH) output voltage range 3.8 V Segment driver intermediate potential (VM) output voltage range 1.9 V Icon positive power supply (VICON) output voltage range 2.2 V (This supply can be set arbitrarily by external resistors.) Low current consumption 100 A typ. (mode 1, VBAT 10 A typ. (mode 2, VBAT 1 A max. (mode 3, VBAT = 3 V) Triple operation mode function: Triple mode switching according to 2-bit input Mode 1: Normal operation Mode 2: Icon mode (reference voltage circuit- and regulator S-only operation) Mode 3: Standby mode (power off) Power-off function Stops step-up or step-down operation and short circuits VRH and VRL to VSS by on-chip and external Nch transistors. Soft-start function: This function can be set according to an external capacitor (CSS). Oscillation frequency: 100 kHz 20 kHz, Duty = 50%

Applications
24-pin TSSOP package (PKG diagram code: FT024-A) Seiko Instruments Inc. 1

Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply S-8335 Series Rev.5.2 Block Diagram


Figure 1. Block Diagram Note: Except for op-amp X, all of the power for the internal circuits of the S-8335 Series is supplied by the VBAT pins. The power supply for op-amp X uses VOUT3, which is generated by stepping up VBAT using DC/DC U. Short-circuit the VOUT3 and VDDX pins as shown in the figure above.

Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply S-8335 Series Rev.5.2 Selection Guide

Package name (abbreviation) Product type 240: 1/240 duty support 200: 1/200 duty support 160: 1/160 duty support 120: 1/120 duty support

2. Product list S-8335AXXXFT Series Bias Ratio Common Driver Positive Power Supply VRH Output Voltage Range [V] VRH_min S-8335A160FT S-8335A120FT VRH_max Common Driver Negative Power Supply VRL Output Voltage Range [V] VRL_min VRL_max

Note: VRH_min and VRL_min indicate the typical value of the VRH and VRL output voltage, respectively, when the electric volume is set to the minimum, and VRH_max and VRL_max indicate the typical value of the VRH and VRL output voltage, respectively, when the electric volume is set to the maximum. Also, VRH_max is obtained from VRETGO 7.136 and VRH_min is obtained from VRETGO 3.832, where VRETGO is the regulator T output voltage.


 

Related products with the same datasheet
S-8335A120FT
S-8335A160FT
S-8335A240FT
S-8335AXXXFT
S-8335A120FT-TB-G
S-8335A160FT-TB-G
S-8335A200FT-TB-G
S-8335A240FT-TB-G
Some Part number from the same manufacture Seiko Instruments
S-8335A240FT Control Method = 3-channel For LCD ;; Operation Start Voltage = (Input 2.4-5V) ;; Output Voltage = Maximum 12.41-16.59V) ;; Output Accuracy = - ;; Switching Frequency = 100 KHZ ;; Current Consumption Operating
S-8337 Control Method = PWM ;; Operation Start Voltage = (Input 1.8 to 6.0 V) ;; Output Voltage = Desired Output Voltage Via External Resistor ;; Output Accuracy = - ;; Switching Frequency = 286 KHZ to 1.133
 
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