L99LD20 datasheet(43/61 Pages) STMICROELECTRONICS

Part #	L99LD20

Description	High power LED driver for automotive applications

PDF	61 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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43 / 61 page

DS11366 Rev 3

43/61

L99LD20

Electrical specifications

5.3

Thermal characteristics

Table 31. QFN40L 6x6 thermal resistance

Symbol

Parameter

Min

Typ

Max

Unit

Rthj-amb

(1)

Device mounted on four layers 2s2p PCB (thermally enhanced, slug included).

Thermal resistance junction to ambient (JEDEC JESD 51-2)

—

°C/W

Rthj-board Thermal resistance junction to board (JEDEC JESD 51-8)

—

°C/W

Rthj-case Junction-to-case thermal resistance

—

7.2

—

°C/W

Table 32. Thermal characteristics

Symbol

Parameter

Min

Typ

Max

Unit

TJ_OP

Operating junction temperature

-40

150

°C

TW1

Junction temperature warning 1

120

130

140

°C

TW1_HYS

Temperature warning 1 hysteresis

°C

TW2

Junction temperature warning 2

130

140

150

°C

TW2_HYS

Temperature warning 2 hysteresis

°C

TTSD

Junction thermal shutdown

155

165

175

°C

TTSD_HYS

Junction thermal shutdown hysteresis

°C

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