BD9206EFV Datasheet, PDF (7/13 Pages) Rohm – Simple Structure Constant Current Backlight Driver for LCD panels (Non-step type)

BD9206EFV
●Timing chart
VCC
VSET
STBY
EN
VREG
3.0V
UV_UL_VO_Li_Ont₍e_å†rn_部al _ä¿¡sig_号na₎l
TS_TD_SDin₍t_å†ern_部al_ä¿¡sig_号na₎l
ILED
①②③④ ⑤
Technical Note
① VCC input.
② VSET Setting
③ It moves to OFF mode due to STBY =
L -> H. 5VREG (VREG) start. Rising
time ms.
④ It becomes UVLO = H depending upon
VREG >3.0V, it moves to stand-by
mode. As for LED driver, it is ready
state.
⑤ LED Lighting with EN = L -> H .
⑥ LED lighting out with EN = H → L
⑦ it is same with ⑤
⑧ Detecting TSD with Ta > 175℃,
LED lighting out
2.9V
⑨ Deleting TSD with Ta < 155℃,
LED lighting
⑩LED lighting out with STBY,EN=H→L
⑪Detecting UVLO=L with VREG<2.9V
⑥
Fig..7
⑦ ⑧ ⑨ ⑩⑪
※Please be careful about a current flowing to the VCC side via the diode for electrostatic breakdown protection if a
voltage is applied to STBY terminal or EN terminal earlier than to VCC terminal.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
7/12
2009.07 - Rev.A